diff --git a/tpws/helpers.c b/tpws/helpers.c
index 5e5393e..993702f 100644
--- a/tpws/helpers.c
+++ b/tpws/helpers.c
@@ -321,13 +321,9 @@ __attribute__((optimize ("no-strict-aliasing")))
 #endif
 void ip6_and(const struct in6_addr * restrict a, const struct in6_addr * restrict b, struct in6_addr * restrict result)
 {
-#ifdef __SIZEOF_INT128__
-	// gcc and clang have 128 bit int types on some 64-bit archs. take some advantage
-	*((unsigned __int128*)result->s6_addr) = *((unsigned __int128*)a->s6_addr) & *((unsigned __int128*)b->s6_addr);
-#else
+	// int 128 can cause alignment segfaults because sin6_addr in struct sockaddr_in6 is 8-byte aligned, not 16-byte
 	((uint64_t*)result->s6_addr)[0] = ((uint64_t*)a->s6_addr)[0] & ((uint64_t*)b->s6_addr)[0];
 	((uint64_t*)result->s6_addr)[1] = ((uint64_t*)a->s6_addr)[1] & ((uint64_t*)b->s6_addr)[1];
-#endif
 }
 
 void str_cidr4(char *s, size_t s_len, const struct cidr4 *cidr)
diff --git a/tpws/helpers.h b/tpws/helpers.h
index 0447809..4279e35 100644
--- a/tpws/helpers.h
+++ b/tpws/helpers.h
@@ -13,7 +13,6 @@ typedef union
 {
 	struct sockaddr_in sa4;		// size 16
 	struct sockaddr_in6 sa6;	// size 28
-	char _align[32];		// force 16-byte alignment for ip6_and int128 ops
 } sockaddr_in46;
 
 void rtrim(char *s);