diff --git a/src/common/memory.cpp b/src/common/memory.cpp
index 7509750cd3..5ec13fc7db 100644
--- a/src/common/memory.cpp
+++ b/src/common/memory.cpp
@@ -1076,6 +1076,8 @@ void wxTraceLevel(int, const wxChar * ...)
 }
 
 #else // wxUSE_MEMORY_TRACING && defined(__WXDEBUG__)
+// Already defined in memory.h
+#if 0
 void wxTrace(const char *WXUNUSED(fmt) ...)
 {
 }
@@ -1084,4 +1086,5 @@ void wxTraceLevel(int WXUNUSED(level), const char *WXUNUSED(fmt) ...)
 {
 }
 #endif
+#endif