diff --git a/common/ihevc_macros.h b/common/ihevc_macros.h
index b3fb743..27d4f30 100644
--- a/common/ihevc_macros.h
+++ b/common/ihevc_macros.h
@@ -49,6 +49,7 @@
 #define ALIGN32(x)  ((((x) + 31) >> 5) << 5)
 #define ALIGN16(x)  ((((x) + 15) >> 4) << 4)
 #define ALIGN8(x)   ((((x) + 7) >> 3) << 3)
+#define ALIGN4(x)   ((((x) + 3) >> 2) << 2)
 
 #define ALIGN_POW2(ptr,align) ((((WORD32)ptr)+align-1)&(~(align-1)))
 
diff --git a/decoder/ihevcd_utils.c b/decoder/ihevcd_utils.c
index c46a4e6..aec64e2 100644
--- a/decoder/ihevcd_utils.c
+++ b/decoder/ihevcd_utils.c
@@ -354,6 +354,8 @@ WORD32 ihevcd_get_pic_mv_bank_size(WORD32 num_luma_samples)
     /* Size for storing pu_t for each PU */
     mv_bank_size += num_pu * sizeof(pu_t);
 
+    /* Size for storing slice_idx for each CTB */
+    mv_bank_size += ALIGN4(num_ctb * sizeof(UWORD16));
 
     size =  mv_bank_size;
     return size;
@@ -720,7 +722,7 @@ IHEVCD_ERROR_T ihevcd_mv_buf_mgr_add_bufs(codec_t *ps_codec)
         pu1_buf += num_pu;
 
         ps_mv_buf->pu1_pic_slice_map = (UWORD16 *)pu1_buf;
-        pu1_buf += num_ctb * sizeof(UWORD16);
+        pu1_buf += ALIGN4(num_ctb * sizeof(UWORD16));
 
         ps_mv_buf->ps_pic_pu = (pu_t *)pu1_buf;