diff --git a/inc/Data/Driver/Metadata/PngExifReader.php b/inc/Data/Driver/Metadata/PngExifReader.php
index f77693ed..07a9cd7c 100644
--- a/inc/Data/Driver/Metadata/PngExifReader.php
+++ b/inc/Data/Driver/Metadata/PngExifReader.php
@@ -120,7 +120,7 @@ class PngExifReader implements ExifReader {
 					$size = $chunk['size'];
 					$chunk_blob = \fread($fd, $size);
 					$ret = self::tryReadExifChunk($chunk_blob);
-					if ($ret < 1) {
+					if ($ret > 0 && $ret < 10) {
 						return $ret;
 					}
 				}