1 files changed, 1 insertions, 1 deletions
diff --git a/src/url.c b/src/url.c
index 13081a0..651f26c 100644
--- a/src/url.c
+++ b/src/url.c
@@ -6,7 +6,7 @@ int urlencode (char * o, const char * i /* o must have at least strlen(i)*3+1 by
 		if (isalnum(*i) || *i == '.' || *i == '_' || *i == '-' || *i == '~') {
 			o[written++] = *i;
 		} else {
-			sprintf(o+written, "%%%02X", *i);
+			sprintf(o+written, "%%%02X", (unsigned char) *i);
 			written += 3;
 		}
 	}