1 files changed, 1 insertions, 1 deletions
diff --git a/wtf8.h b/wtf8.h
index c4241a8..5a80f30 100644
--- a/wtf8.h
+++ b/wtf8.h
@@ -1,6 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-int is_utf8_cont(char);
+int is_utf8_cont(unsigned char);
 void print_octets(char *);
 void print_characters(char *);