diff --git a/flang/lib/Lower/ConvertExpr.cpp b/flang/lib/Lower/ConvertExpr.cpp
--- a/flang/lib/Lower/ConvertExpr.cpp
+++ b/flang/lib/Lower/ConvertExpr.cpp
@@ -3020,10 +3020,13 @@
 };
 } // namespace
 
+#define CONCAT(x, y) CONCAT2(x, y)
+#define CONCAT2(x, y) x##y
+
 // Helper for changing the semantics in a given context. Preserves the current
 // semantics which is resumed when the "push" goes out of scope.
 #define PushSemantics(PushVal)                                                 \
-  [[maybe_unused]] auto pushSemanticsLocalVariable##__LINE__ =                 \
+  [[maybe_unused]] auto CONCAT(pushSemanticsLocalVariable, __LINE__) =         \
       Fortran::common::ScopedSet(semant, PushVal);
 
 static bool isAdjustedArrayElementType(mlir::Type t) {