1 files changed, 2 insertions, 0 deletions

diff --git a/src/s/dgux.h b/src/s/dgux.h
index e93ce484cb9..665b1071b71 100644
--- a/src/s/dgux.h
+++ b/src/s/dgux.h
@@ -351,7 +351,9 @@ CC=gcc
   if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
     fatal ("ioctl I_PUSH ttcompat", errno);
 
+#ifdef __GNUC__
 #define C_DEBUG_SWITCH -g -V2 -mversion-03.00 -mstandard
+#endif
 
 #endif /* ELF */