diff --git a/test/core/util/debugger_macros.h b/test/core/util/debugger_macros.h
index 4494176560dde9adb9054d10cd3b7b5c8fa909df..772fb2a2907de70d4cbf9e3d87543de8d493a324 100644
--- a/test/core/util/debugger_macros.h
+++ b/test/core/util/debugger_macros.h
@@ -31,9 +31,9 @@
  *
  */
 
-#ifndef DEBUGGER_MACROS_H
-#define DEBUGGER_MACROS_H
+#ifndef GRPC_CORE_EXT_DEBUG_DEBUGGER_MACROS_H
+#define GRPC_CORE_EXT_DEBUG_DEBUGGER_MACROS_H
 
 void grpc_summon_debugger_macros();
 
-#endif
+#endif /* GRPC_CORE_EXT_DEBUG_DEBUGGER_MACROS_H */