diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index e93d45e151..b017c90c36 100644
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -1262,6 +1262,13 @@ static int vtenc_create_encoder(AVCodecContext   *avctx,
                                           compat_keys.kVTCompressionPropertyKey_TargetQualityForAlpha,
                                           alpha_quality_num);
             CFRelease(alpha_quality_num);
+
+            if (status) {
+                av_log(avctx,
+                       AV_LOG_ERROR,
+                       "Error setting alpha quality: %d\n",
+                       status);
+            }
         }
     }