diff --git a/src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp b/src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp
index c0fd3e0d09..a8ec71d427 100644
--- a/src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp
+++ b/src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp
@@ -361,7 +361,7 @@ mp3Decoder::IsValidStream(const uint8 *buffer, int size)
 		return false;
 	int version_index2 = (buffer[length1 + 1] >> 3) & 0x03;
 	int layer_index2 = (buffer[length1 + 1] >> 1) & 0x03;
-	if (version_index1 != version_index2 || layer_index1 != layer_index1)
+	if (version_index1 != version_index2 || layer_index1 != layer_index2)
 		return false;
 	int length3 = GetFrameLength(buffer + length1 + length2);
 	if (length3 < 0)