diff --git a/cpp/ql/src/Likely Bugs/Memory Management/NtohlArrayNoBound.qll b/cpp/ql/src/Likely Bugs/Memory Management/NtohlArrayNoBound.qll
index 0871da2f92e..9606fb968ec 100644
--- a/cpp/ql/src/Likely Bugs/Memory Management/NtohlArrayNoBound.qll	
+++ b/cpp/ql/src/Likely Bugs/Memory Management/NtohlArrayNoBound.qll	
@@ -122,7 +122,7 @@ class MallocSizeExpr extends BufferAccess, FunctionCall {
 
   override Expr getPointer() { none() }
 
-  override Expr getAccessedLength() { result = getArgument(1) }
+  override Expr getAccessedLength() { result = getArgument(0) }
 }
 
 class NetworkFunctionCall extends FunctionCall {