diff --git a/tests/manual/gdbdebugger/simple/app.cpp b/tests/manual/gdbdebugger/simple/app.cpp
index aca2f215997..c1d8742cc23 100644
--- a/tests/manual/gdbdebugger/simple/app.cpp
+++ b/tests/manual/gdbdebugger/simple/app.cpp
@@ -73,7 +73,7 @@
 #include <string>
 #include <vector>
 
-#if defined(__GNUC__)
+#if defined(__GNUC__) && !defined(__llvm__)
 #    define USE_GCC_EXT 1
 #    include <hash_set>
 #endif