Index: exo-url.c
===================================================================
--- exo-url.c	(revision 19729)
+++ exo-url.c	(working copy)
@@ -57,6 +57,10 @@
 #define MATCH_MAILER    "\\<(mailto:)?[a-z0-9][a-z0-9.-]*@[a-z0-9][a-z0-9-]*(\\.[a-z0-9][a-z0-9-]*)+\\>"
 #endif
 
+/* workaround for the missing `FNM_CASEFOLD' on some platforms. */
+#ifndef FNM_CASEFOLD
+#define FNM_CASEFOLD 0x08
+#endif /* FNM_CASEFOLD */
 
 
 /**