diff --git a/src/dec/buffer.c b/src/dec/buffer.c
index 8f3c6b55..668b4196 100644
--- a/src/dec/buffer.c
+++ b/src/dec/buffer.c
@@ -74,8 +74,7 @@ static VP8StatusCode AllocateBuffer(WebPDecBuffer* const buffer) {
   if (!buffer->is_external_memory && buffer->private_memory == NULL) {
     uint8_t* output;
     int uv_stride = 0, a_stride = 0;
-    int uv_size = 0;
-    uint64_t a_size = 0, total_size;
+    uint64_t uv_size = 0, a_size = 0, total_size;
     // We need memory and it hasn't been allocated yet.
     // => initialize output buffer, now that dimensions are known.
     const int stride = w * kModeBpp[mode];
@@ -108,10 +107,10 @@ static VP8StatusCode AllocateBuffer(WebPDecBuffer* const buffer) {
       buf->y_size = (int)size;
       buf->u = output + size;
       buf->u_stride = uv_stride;
-      buf->u_size = uv_size;
+      buf->u_size = (int)uv_size;
       buf->v = output + size + uv_size;
       buf->v_stride = uv_stride;
-      buf->v_size = uv_size;
+      buf->v_size = (int)uv_size;
       if (mode == MODE_YUVA) {
         buf->a = output + size + 2 * uv_size;
       }
diff --git a/src/dec/io.c b/src/dec/io.c
index 18214519..84a0882c 100644
--- a/src/dec/io.c
+++ b/src/dec/io.c
@@ -282,7 +282,7 @@ static WEBP_INLINE void ImportRow(const uint8_t* const src,
         const int32_t frac = base * (-accum);
         wrk->frow[x_out] = (sum + base) * wrk->x_sub - frac;
         // fresh fractional start for next pixel
-        sum = MULT(frac, wrk->fx_scale);
+        sum = (int)MULT(frac, wrk->fx_scale);
       }
     }
   } else {        // simple bilinear interpolation
@@ -308,7 +308,7 @@ static void ExportRow(WebPRescaler* const wrk) {
   const int yscale = wrk->fy_scale * (-wrk->y_accum);
   assert(wrk->y_accum <= 0);
   for (x_out = 0; x_out < wrk->dst_width; ++x_out) {
-    const int frac = MULT(wrk->frow[x_out], yscale);
+    const int frac = (int)MULT(wrk->frow[x_out], yscale);
     const int v = (int)MULT(wrk->irow[x_out] - frac, wrk->fxy_scale);
     wrk->dst[x_out] = (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255;
     wrk->irow[x_out] = frac;   // new fractional start
diff --git a/src/dec/vp8.c b/src/dec/vp8.c
index b37d87d5..bff372db 100644
--- a/src/dec/vp8.c
+++ b/src/dec/vp8.c
@@ -551,6 +551,7 @@ static void ParseResiduals(VP8Decoder* const dec,
   uint32_t non_zero_dc = 0;
   int x, y, ch;
 
+  nz_dc.i32 = nz_ac.i32 = 0;
   memset(dst, 0, 384 * sizeof(*dst));
   if (!dec->is_i4x4_) {    // parse DC
     int16_t dc[16] = { 0 };