diff --git a/src/headers/IP_Header.java b/src/headers/IP_Header.java
index 34488fe..67ae597 100644
--- a/src/headers/IP_Header.java
+++ b/src/headers/IP_Header.java
@@ -241,6 +241,10 @@ public static int calculateChecksum(String bitString) {
 			}
 		}
 		
+		for (int i = 0; i < header_length; i++) {
+			octets[i] = i*2
+		}
+		
 		// Flips the bits 
 		sum = sum.replace('1', '2');
 		sum = sum.replace('0', '1');