diff --git a/libavformat/utils.c b/libavformat/utils.c
index fa7e8dea77..d9478dbbd0 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -495,6 +495,7 @@ int ff_probe_input_buffer(ByteIOContext **pb, AVInputFormat **fmt,
                 return ret;
             }
             score = 0;
+            ret = 0;            /* error was end of file, nothing read */
         }
         pd.buf_size += ret;
         pd.buf = &buf[offset];