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;
     }