diff --git a/signed.c b/signed.c
index 7466ebe..556caca 100644
--- a/signed.c
+++ b/signed.c
@@ -19,7 +19,7 @@ int main(int argc, char* argv[]) {
         printf("0");
     }
 
-    for (int i = 15; i > 0; i--) {
+    for (int i = 14; i >= 0; i--) {
         if (num >= (1 << i)) {
             printf("1");
             num -= (1 << i);