diff --git a/Mk/Wrappers/gm4 b/Mk/Wrappers/gm4
index ecc0796c729a..8b1e7a64f700 100644
--- a/Mk/Wrappers/gm4
+++ b/Mk/Wrappers/gm4
@@ -1,6 +1,6 @@
 #!/bin/sh
 
 case " $@ " in
 *" --version "*) echo "m4 (GNU M4) 1.4.18" ;;
-*) exec m4 -g $@ ;;
+*) exec m4 -g "$@" ;;
 esac