diff --git a/src/addition.c b/src/addition.c
index 753d77d..6d7ca86 100644
--- a/src/addition.c
+++ b/src/addition.c
@@ -3,4 +3,6 @@
 
 void full_adder (int* sum, int* nextcarry, int number1, int number2, int carry) {
     sum[0] = number1 ^ number2 ^ carry;
+    
+    nextcarry[0] = (number1 & number2) | (number1 & carry) | (number2 & carry);
 }
\ No newline at end of file