diff --git a/engine/client/sys_morphos.c b/engine/client/sys_morphos.c
index 44d4eb537..2b6874bf0 100755
--- a/engine/client/sys_morphos.c
+++ b/engine/client/sys_morphos.c
@@ -198,7 +198,7 @@ int Sys_FileTime(char *path)
 	return ret;
 }
 
-int Sys_EnumerateFiles(char *gpath, char *match, int (*func)(char *, int, void *), void *parm)
+int Sys_EnumerateFiles(const char *gpath, const char *match, int (*func)(const char *, int, void *), void *parm)
 {
 	char *pattern;
 	char pattrans[256];