--- groff-1.18.1.1/src/libs/libdriver/input.cc.orig	2006-01-10 11:11:36.000000000 +0100
+++ groff-1.18.1.1/src/libs/libdriver/input.cc	2006-01-10 11:11:52.000000000 +0100
@@ -1786,7 +1786,7 @@
 	if (npages <= 0)
 	  fatal_command(command);
 	char *str_arg = get_string_arg();
-	size_t i = 0;
+	int i = 0;
 	while ((c = str_arg[i++]) != '\0') {
 	  EnvInt w;
 #ifdef	ENABLE_MULTIBYTE