diff --git a/libavfilter/vf_thumbnail_cuda.c b/libavfilter/vf_thumbnail_cuda.c
index 0459070800..8efb54f079 100644
--- a/libavfilter/vf_thumbnail_cuda.c
+++ b/libavfilter/vf_thumbnail_cuda.c
@@ -291,7 +291,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
             hist[i] = 4 * hist[i];
     }
 
-    CHECK_CU(cu->cuCtxPopCurrent(&dummy));
+    ret = CHECK_CU(cu->cuCtxPopCurrent(&dummy));
     if (ret < 0)
         return ret;