diff --git a/cros_gralloc/gralloc4/CrosGralloc4Mapper.cc b/cros_gralloc/gralloc4/CrosGralloc4Mapper.cc
index 47e24ac..2a3f4c0 100644
--- a/cros_gralloc/gralloc4/CrosGralloc4Mapper.cc
+++ b/cros_gralloc/gralloc4/CrosGralloc4Mapper.cc
@@ -467,7 +467,12 @@
         PixelFormat pixelFormat = static_cast<PixelFormat>(crosHandle->droid_format);
         status = android::gralloc4::encodePixelFormatRequested(pixelFormat, &encodedMetadata);
     } else if (metadataType == android::gralloc4::MetadataType_PixelFormatFourCC) {
-        status = android::gralloc4::encodePixelFormatFourCC(crosHandle->format, &encodedMetadata);
+        uint32_t format = crosHandle->format;
+        // Map internal fourcc codes back to standard fourcc codes.
+        if (format == DRM_FORMAT_YVU420_ANDROID) {
+            format = DRM_FORMAT_YVU420;
+        }
+        status = android::gralloc4::encodePixelFormatFourCC(format, &encodedMetadata);
     } else if (metadataType == android::gralloc4::MetadataType_PixelFormatModifier) {
         status = android::gralloc4::encodePixelFormatModifier(crosHandle->format_modifier,
                                                               &encodedMetadata);