diff -urN ircd-hybrid-7.2.1.orig/src/lex.yy.c ircd-hybrid-7.2.1/src/lex.yy.c
--- ircd-hybrid-7.2.1.orig/src/lex.yy.c	2006-06-24 18:44:37.000000000 +0200
+++ ircd-hybrid-7.2.1/src/lex.yy.c	2006-06-24 18:45:39.000000000 +0200
@@ -7,8 +7,9 @@
 
 #if defined(__FreeBSD__)
 #include <sys/cdefs.h>
+#define REALLOC_SUFFIX __unused
 #else
-#define __unused
+#define REALLOC_SUFFIX
 #endif
 
 #define FLEX_SCANNER
@@ -247,7 +248,7 @@
 YY_BUFFER_STATE yy_scan_bytes YY_PROTO(( yyconst char *bytes, int len ));
 
 static void *yy_flex_alloc YY_PROTO(( yy_size_t ));
-static void *yy_flex_realloc YY_PROTO(( void *, yy_size_t )) __unused;
+static void *yy_flex_realloc YY_PROTO(( void *, yy_size_t )) REALLOC_SUFFIX;
 static void yy_flex_free YY_PROTO(( void * ));
 
 #define yy_new_buffer yy_create_buffer