diff --git a/src/include/ip_checksum.h b/src/include/ip_checksum.h
index f6ef560..f2632e7 100644
--- a/src/include/ip_checksum.h
+++ b/src/include/ip_checksum.h
@@ -1,5 +1,6 @@
 #ifndef IP_CHECKSUM_H
 #define IP_CHECKSUM_H
 unsigned long compute_ip_checksum(const void *addr, unsigned long length);
-unsigned long add_ip_checksums(unsigned long offset, unsigned long sum, unsigned long new);
+unsigned long add_ip_checksums(unsigned long offset, unsigned long sum,
+	unsigned long new);
 #endif /* IP_CHECKSUM_H */