diff --git a/cpp/ql/lib/semmle/code/cpp/controlflow/IRGuards.qll b/cpp/ql/lib/semmle/code/cpp/controlflow/IRGuards.qll
index 824e5886c62..211be2aa432 100644
--- a/cpp/ql/lib/semmle/code/cpp/controlflow/IRGuards.qll
+++ b/cpp/ql/lib/semmle/code/cpp/controlflow/IRGuards.qll
@@ -684,24 +684,26 @@ final class GuardCondition = GuardConditionImpl;
  */
 private class GuardConditionFromBinaryLogicalOperator extends GuardConditionImpl instanceof Cpp::BinaryLogicalOperation
 {
+  GuardConditionImpl l;
+  GuardConditionImpl r;
+
+  GuardConditionFromBinaryLogicalOperator() {
+    super.getLeftOperand() = l and
+    super.getRightOperand() = r
+  }
+
   override predicate valueControls(Cpp::BasicBlock controlled, GuardValue v) {
-    exists(Cpp::BinaryLogicalOperation binop, GuardCondition lhs, GuardCondition rhs |
-      this = binop and
-      lhs = binop.getLeftOperand() and
-      rhs = binop.getRightOperand() and
-      lhs.valueControls(controlled, v) and
-      rhs.valueControls(controlled, v)
-    )
+    // `l || r` does not control `r` even though `l` does.
+    not r.(Cpp::Expr).getBasicBlock() = controlled and
+    l.valueControls(controlled, v)
+    or
+    r.valueControls(controlled, v)
   }
 
   override predicate valueControlsEdge(Cpp::BasicBlock pred, Cpp::BasicBlock succ, GuardValue v) {
-    exists(Cpp::BinaryLogicalOperation binop, GuardCondition lhs, GuardCondition rhs |
-      this = binop and
-      lhs = binop.getLeftOperand() and
-      rhs = binop.getRightOperand() and
-      lhs.valueControlsEdge(pred, succ, v) and
-      rhs.valueControlsEdge(pred, succ, v)
-    )
+    l.valueControlsEdge(pred, succ, v)
+    or
+    r.valueControlsEdge(pred, succ, v)
   }
 
   pragma[nomagic]
diff --git a/cpp/ql/test/library-tests/controlflow/guards-ir/tests.expected b/cpp/ql/test/library-tests/controlflow/guards-ir/tests.expected
index 747564a745e..62cecc05915 100644
--- a/cpp/ql/test/library-tests/controlflow/guards-ir/tests.expected
+++ b/cpp/ql/test/library-tests/controlflow/guards-ir/tests.expected
@@ -384,7 +384,9 @@ astGuardsControl
 | test.c:126:7:126:7 | 1 | true | 131 | 132 |
 | test.c:126:7:126:7 | 1 | true | 134 | 123 |
 | test.c:126:7:126:28 | ... && ... | true | 126 | 128 |
+| test.c:126:7:126:28 | ... && ... | true | 131 | 131 |
 | test.c:126:7:126:28 | ... && ... | true | 131 | 132 |
+| test.c:126:7:126:28 | ... && ... | true | 134 | 123 |
 | test.c:126:12:126:26 | call to test3_condition | true | 126 | 128 |
 | test.c:126:12:126:26 | call to test3_condition | true | 131 | 132 |
 | test.c:131:7:131:7 | b | true | 131 | 132 |
@@ -787,13 +789,21 @@ astGuardsEnsure_const
 | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 131 | 132 |
 | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 134 | 123 |
 | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | 126 | 128 |
+| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | 131 | 131 |
 | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | 131 | 132 |
+| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | 134 | 123 |
 | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | 126 | 128 |
+| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | 131 | 131 |
 | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | 131 | 132 |
+| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | 134 | 123 |
 | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | 126 | 128 |
+| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | 131 | 131 |
 | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | 131 | 132 |
+| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | 134 | 123 |
 | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | 126 | 128 |
+| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | 131 | 131 |
 | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | 131 | 132 |
+| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | 134 | 123 |
 | test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | != | 0 | 126 | 128 |
 | test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | != | 0 | 131 | 132 |
 | test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | == | 1 | 126 | 128 |
diff --git a/cpp/ql/test/library-tests/controlflow/guards/GuardsControl.expected b/cpp/ql/test/library-tests/controlflow/guards/GuardsControl.expected
index 040173a2a4b..947fffd95f6 100644
--- a/cpp/ql/test/library-tests/controlflow/guards/GuardsControl.expected
+++ b/cpp/ql/test/library-tests/controlflow/guards/GuardsControl.expected
@@ -105,9 +105,13 @@
 | test.c:126:7:126:7 | 1 | true | test.c:131:10:132:16 | { ... } |
 | test.c:126:7:126:7 | 1 | true | test.c:134:1:123:10 | return ... |
 | test.c:126:7:126:28 | ... && ... | not 0 | test.c:126:31:128:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | not 0 | test.c:131:3:131:7 | if (...) ...  |
 | test.c:126:7:126:28 | ... && ... | not 0 | test.c:131:10:132:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | not 0 | test.c:134:1:123:10 | return ... |
 | test.c:126:7:126:28 | ... && ... | true | test.c:126:31:128:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | true | test.c:131:3:131:7 | if (...) ...  |
 | test.c:126:7:126:28 | ... && ... | true | test.c:131:10:132:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | true | test.c:134:1:123:10 | return ... |
 | test.c:126:12:126:26 | call to test3_condition | not 0 | test.c:126:31:128:16 | { ... } |
 | test.c:126:12:126:26 | call to test3_condition | not 0 | test.c:131:10:132:16 | { ... } |
 | test.c:126:12:126:26 | call to test3_condition | true | test.c:126:31:128:16 | { ... } |
diff --git a/cpp/ql/test/library-tests/controlflow/guards/GuardsEnsure.expected b/cpp/ql/test/library-tests/controlflow/guards/GuardsEnsure.expected
index a1d3a37bea2..5a364e3deaa 100644
--- a/cpp/ql/test/library-tests/controlflow/guards/GuardsEnsure.expected
+++ b/cpp/ql/test/library-tests/controlflow/guards/GuardsEnsure.expected
@@ -758,13 +758,21 @@ unary
 | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | test.c:131:10:132:16 | { ... } |
 | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | test.c:134:1:123:10 | return ... |
 | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | test.c:126:31:128:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | test.c:131:3:131:7 | if (...) ...  |
 | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | test.c:131:10:132:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | test.c:134:1:123:10 | return ... |
 | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | test.c:126:31:128:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | test.c:131:3:131:7 | if (...) ...  |
 | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | test.c:131:10:132:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | test.c:134:1:123:10 | return ... |
 | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | test.c:126:31:128:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | test.c:131:3:131:7 | if (...) ...  |
 | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | test.c:131:10:132:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | test.c:134:1:123:10 | return ... |
 | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | test.c:126:31:128:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | test.c:131:3:131:7 | if (...) ...  |
 | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | test.c:131:10:132:16 | { ... } |
+| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | test.c:134:1:123:10 | return ... |
 | test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | != | 0 | test.c:126:31:128:16 | { ... } |
 | test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | != | 0 | test.c:131:10:132:16 | { ... } |
 | test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | == | 1 | test.c:126:31:128:16 | { ... } |