diff --git a/compiz-gtk b/compiz-gtk
index caad9a6..375892d 100644
--- a/compiz-gtk
+++ b/compiz-gtk
@@ -11,7 +11,7 @@ ISSW=`glxinfo | grep "Software Rasterizer" -c`
 # Try with direct rendering
 HAVETFP=`glxinfo | grep texture_from_pixmap -c`
 
-if ( [ $HAVE3D == "Yes" ] && [ $HAVETFP -gt 2 ] ); then 
+if ( [ $HAVE3D == "Yes" ]  && [ $ISSW == 0 ] && [ $HAVETFP -gt 2 ] ); then 
 	runCompiz $@
 fi