diff --git a/src/addition.c b/src/addition.c
index 9cdc24d..fbf355a 100644
--- a/src/addition.c
+++ b/src/addition.c
@@ -2,5 +2,5 @@
 #include <stdlib.h>
 
 void volladdierer (int* s, int* nc, int a, int b, int c) {
-    s[0] = 0;
+    s[0] = c;
 }
\ No newline at end of file