diff --git a/src/tools/vmap3_extractor/vmapexport.cpp b/src/tools/vmap3_extractor/vmapexport.cpp
index 1d2079179f..913fd4f9e4 100644
--- a/src/tools/vmap3_extractor/vmapexport.cpp
+++ b/src/tools/vmap3_extractor/vmapexport.cpp
@@ -461,7 +461,7 @@ int main(int argc, char ** argv)
     //xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
     // Create the working directory
     if(mkdir(szWorkDirWmo
-#ifdef __linux__
+#ifdef _XOPEN_UNIX
                     , 0711
 #endif
                     ))