diff --git a/libs/video/targets/qfgl_ext.c b/libs/video/targets/qfgl_ext.c
index bc6b2dd59..e0c3bf7bc 100644
--- a/libs/video/targets/qfgl_ext.c
+++ b/libs/video/targets/qfgl_ext.c
@@ -77,6 +77,9 @@ QFGL_ParseExtensionList (const GLubyte * list, const char *name)
 	const char *start;
 	char       *where, *terminator;
 
+	if (!list)
+		return 0;
+
 	// Extension names must not have spaces.
 	where = (GLubyte *) strchr (name, ' ');
 	if (where || *name == '\0')