--- src/xercesc/util/Transcoders/IconvGNU/IconvGNUTransService.cpp
+++ src/xercesc/util/Transcoders/IconvGNU/IconvGNUTransService.cpp
@@ -429,8 +427,10 @@
 
 void reinitIconvGNUMutex()
 {
+#if !defined(APP_NO_THREADS)
     delete gIconvMutex;
     gIconvMutex = 0;
+#endif
 }
 
 IconvGNUTransService::IconvGNUTransService()