diff --git a/av1/common/x86/warp_plane_sse4.c b/av1/common/x86/warp_plane_sse4.c
index 6112368..10ddf92 100644
--- a/av1/common/x86/warp_plane_sse4.c
+++ b/av1/common/x86/warp_plane_sse4.c
@@ -462,8 +462,8 @@
 
   const int w0 = conv_params->fwd_offset;
   const int w1 = conv_params->bck_offset;
-  const __m128i wt0 = _mm_set1_epi16(w0);
-  const __m128i wt1 = _mm_set1_epi16(w1);
+  const __m128i wt0 = _mm_set1_epi16((int16_t)w0);
+  const __m128i wt1 = _mm_set1_epi16((int16_t)w1);
   *wt = _mm_unpacklo_epi16(wt0, wt1);
 }