diff --git a/aom_dsp/x86/loopfilter_sse2.c b/aom_dsp/x86/loopfilter_sse2.c
index e604fcc0626a76a55a06752ab366567d3cce3258..5972dbc771e14c7c0409591b2b61c562101c362c 100644
--- a/aom_dsp/x86/loopfilter_sse2.c
+++ b/aom_dsp/x86/loopfilter_sse2.c
@@ -2222,7 +2222,7 @@ void aom_lpf_vertical_6_sse2(unsigned char *s, int p,
                              const unsigned char *blimit,
                              const unsigned char *limit,
                              const unsigned char *thresh) {
-  DECLARE_ALIGNED(8, unsigned char, t_dst[38]);
+  DECLARE_ALIGNED(8, unsigned char, t_dst[38]) = { 0 };
   unsigned char *src[1];
   unsigned char *dst[1];