diff --git a/python/ql/src/Expressions/ExpectedMappingForFormatString.ql b/python/ql/src/Expressions/ExpectedMappingForFormatString.ql
index b3cfac42e5c..76d2f874779 100644
--- a/python/ql/src/Expressions/ExpectedMappingForFormatString.ql
+++ b/python/ql/src/Expressions/ExpectedMappingForFormatString.ql
@@ -14,6 +14,13 @@ import python
 import semmle.python.strings
 
 from Expr e, ClassValue t
-where exists(BinaryExpr b | b.getOp() instanceof Mod and format_string(b.getLeft()) and e = b.getRight() and
-mapping_format(b.getLeft()) and e.pointsTo().getClass() = t and not t.isMapping())
-select e, "Right hand side of a % operator must be a mapping, not class $@.", t, t.getName()
\ No newline at end of file
+where
+  exists(BinaryExpr b |
+    b.getOp() instanceof Mod and
+    format_string(b.getLeft()) and
+    e = b.getRight() and
+    mapping_format(b.getLeft()) and
+    e.pointsTo().getClass() = t and
+    not t.isMapping()
+  )
+select e, "Right hand side of a % operator must be a mapping, not class $@.", t, t.getName()