diff --git a/panels/common/cc-language-chooser.c b/panels/common/cc-language-chooser.c
index ae6391a78..1c15b4333 100644
--- a/panels/common/cc-language-chooser.c
+++ b/panels/common/cc-language-chooser.c
@@ -188,6 +188,9 @@ match_all (gchar       **words,
 {
         gchar **w;
 
+        if (str == NULL)
+                return FALSE;
+
         for (w = words; *w; ++w)
                 if (!strstr (str, *w))
                         return FALSE;