diff --git a/libwvdrmengine/vts/vendor_module/vts_module.cpp b/libwvdrmengine/vts/vendor_module/vts_module.cpp
index 3daec72c..316b0cc5 100644
--- a/libwvdrmengine/vts/vendor_module/vts_module.cpp
+++ b/libwvdrmengine/vts/vendor_module/vts_module.cpp
@@ -32,7 +32,7 @@ namespace widevine_vts {
 
     void LogResponseError(const string& message, int http_status_code) {
         ALOGD("HTTP Status code = %d", http_status_code);
-        ALOGD("HTTP response(%d): %s", message.size(), b2a_hex(message).c_str());
+        ALOGD("HTTP response(%zd): %s", message.size(), b2a_hex(message).c_str());
     }
 
     vector<uint8_t> WidevineVTSVendorModule_V1::handleProvisioningRequest(
@@ -77,7 +77,7 @@ namespace widevine_vts {
         if (kHttpOk == httpStatusCode) {
             LicenseRequest lic_request;
             lic_request.GetDrmMessage(reply, drm_msg);
-            ALOGV("HTTP response body: (%u bytes)", drm_msg.size());
+            ALOGV("HTTP response body: (%zd bytes)", drm_msg.size());
         }
         vector<uint8_t> result(drm_msg.begin(), drm_msg.end());
         return result;