diff --git a/ksw.c b/ksw.c
index 9793e5e..92fd1e0 100644
--- a/ksw.c
+++ b/ksw.c
@@ -267,7 +267,7 @@ kswr_t ksw_i16(kswq_t *q, int tlen, const uint8_t *target, int _o_del, int _e_de
 		h = _mm_load_si128(H0 + slen - 1); // h={2,5,8,11,14,17,-1,-1} in the above example
 		h = _mm_slli_si128(h, 2);
 		for (j = 0; LIKELY(j < slen); ++j) {
-			h = _mm_adds_epi16(h, *S++);
+			h = _mm_adds_epi16(h, _mm_load_si128(S++));
 			e = _mm_load_si128(E + j);
 			h = _mm_max_epi16(h, e);
 			h = _mm_max_epi16(h, f);