--- src/peval/xx_lexer.y.orig	Sat Nov 27 18:18:56 1999
+++ src/peval/xx_lexer.y	Sat Nov 27 18:19:07 1999
@@ -94,7 +94,7 @@
 NULL,     ERROR_TKN
 };
 
-static inline strtoupper(char *c) {
+static inline void strtoupper(char *c) {
    for (; *c; c++)
       if (isascii(*c) && isalpha(*c))
 	 *c = toupper(*c);