diff --git a/include/socks/util.h b/include/socks/util.h
index 3a0e268..ee5080d 100644
--- a/include/socks/util.h
+++ b/include/socks/util.h
@@ -23,7 +23,7 @@ static inline unsigned long long div64_pow2(unsigned long long x, unsigned long
 
 static inline unsigned long long absdiff64(unsigned long long x, unsigned long long y)
 {
-	return x > y ? y - x : x - y;
+	return x < y ? y - x : x - y;
 }
 
 extern int16_t host_to_big_i16(int16_t v);