diff --git a/vp9/vp9_cx_iface.c b/vp9/vp9_cx_iface.c
index 8072f78a01187e9534f2efec9ae122c40c8d9d72..fbdad74144c2a8c1d0ee92be8dbcc6b24cb1cfce 100644
--- a/vp9/vp9_cx_iface.c
+++ b/vp9/vp9_cx_iface.c
@@ -365,7 +365,7 @@ static vpx_codec_err_t set_vp9e_config(VP9_CONFIG *oxcf,
     memcpy(oxcf->ts_rate_decimator, cfg.ts_rate_decimator,
            sizeof(cfg.ts_rate_decimator));
   } else if (oxcf->ts_number_layers == 1) {
-    oxcf->ts_target_bitrate[0] = oxcf->target_bandwidth;
+    oxcf->ts_target_bitrate[0] = (int)oxcf->target_bandwidth;
     oxcf->ts_rate_decimator[0] = 1;
   }
 
@@ -639,7 +639,7 @@ static int write_superframe_index(vpx_codec_alg_priv_t *ctx) {
 
     *x++ = marker;
     for (i = 0; i < ctx->pending_frame_count; i++) {
-      int this_sz = ctx->pending_frame_sizes[i];
+      unsigned int this_sz = (unsigned int)ctx->pending_frame_sizes[i];
 
       for (j = 0; j <= mag; j++) {
         *x++ = this_sz & 0xff;
@@ -1049,7 +1049,7 @@ static vpx_codec_err_t vp9e_set_svc_layer_id(vpx_codec_alg_priv_t *ctx,
     return VPX_CODEC_INVALID_PARAM;
   }
   if (cpi->svc.spatial_layer_id < 0 ||
-      cpi->svc.spatial_layer_id >= ctx->cfg.ss_number_layers) {
+      cpi->svc.spatial_layer_id >= (int)ctx->cfg.ss_number_layers) {
     return VPX_CODEC_INVALID_PARAM;
   }
   return VPX_CODEC_OK;
diff --git a/vp9/vp9_dx_iface.c b/vp9/vp9_dx_iface.c
index 1941fc0429a85827452f941c52296d0d81299f09..76cbebf196823d6f47dbf3e387d5cd3c4fa0c338 100644
--- a/vp9/vp9_dx_iface.c
+++ b/vp9/vp9_dx_iface.c
@@ -214,7 +214,7 @@ static vpx_codec_err_t vp9_get_si(vpx_codec_alg_priv_t    *ctx,
                        ? sizeof(vp9_stream_info_t)
                        : sizeof(vpx_codec_stream_info_t);
   memcpy(si, &ctx->si, sz);
-  si->sz = sz;
+  si->sz = (unsigned int)sz;
 
   return VPX_CODEC_OK;
 }
@@ -462,7 +462,7 @@ static vpx_codec_err_t vp9_decode(vpx_codec_alg_priv_t  *ctx,
     while (data_start < data_end && *data_start == 0)
       data_start++;
 
-    data_sz = data_end - data_start;
+    data_sz = (unsigned int)(data_end - data_start);
   } while (data_start < data_end);
   return res;
 }
diff --git a/vpxdec.c b/vpxdec.c
index d8157d005a8dc8efcc68f3017bb98dbdafe4669a..660f6136fbc1b6a1652fed41bffb5c55f1cb717d 100644
--- a/vpxdec.c
+++ b/vpxdec.c
@@ -791,7 +791,8 @@ int main_loop(int argc, const char **argv_) {
 
         vpx_usec_timer_start(&timer);
 
-        if (vpx_codec_decode(&decoder, buf, bytes_in_buffer, NULL, 0)) {
+        if (vpx_codec_decode(&decoder, buf, (unsigned int)bytes_in_buffer,
+                             NULL, 0)) {
           const char *detail = vpx_codec_error_detail(&decoder);
           warn("Failed to decode frame %d: %s",
                frame_in, vpx_codec_error(&decoder));
@@ -873,7 +874,7 @@ int main_loop(int argc, const char **argv_) {
                                         vpx_input_ctx.height,
                                         &vpx_input_ctx.framerate, img->fmt);
             if (do_md5) {
-              MD5Update(&md5_ctx, (md5byte *)buf, len);
+              MD5Update(&md5_ctx, (md5byte *)buf, (unsigned int)len);
             } else {
               fputs(buf, outfile);
             }
@@ -882,7 +883,7 @@ int main_loop(int argc, const char **argv_) {
           // Y4M frame header
           len = y4m_write_frame_header(buf, sizeof(buf));
           if (do_md5) {
-            MD5Update(&md5_ctx, (md5byte *)buf, len);
+            MD5Update(&md5_ctx, (md5byte *)buf, (unsigned int)len);
           } else {
             fputs(buf, outfile);
           }