1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tclUtf.c b/generic/tclUtf.c
index 00ca94e..91e9c73 100644
--- a/generic/tclUtf.c
+++ b/generic/tclUtf.c
@@ -712,7 +712,7 @@ Tcl_UtfNext(
 	}
 	next++;
     }
-    if (Overlong(src)) {
+    if (Overlong((unsigned char *)src)) {
 	return src + 1;
     }
     return next;