diff --git a/unix/tkUnixRFont.c b/unix/tkUnixRFont.c

index fd0b556..ae681c9 100644

--- a/unix/tkUnixRFont.c

+++ b/unix/tkUnixRFont.c

@@ -226,7 +226,7 @@ InitFont(

      */

     set = FcFontSort(0, pattern, FcTrue, NULL, &result);

-    if (!set) {

+    if (!set || set->nfont == 0) {

 	ckfree((char *)fontPtr);

 	return NULL;

     }