diff --git a/libavformat/electronicarts.c b/libavformat/electronicarts.c
index 27cd4a62db..f671c2609e 100644
--- a/libavformat/electronicarts.c
+++ b/libavformat/electronicarts.c
@@ -113,6 +113,8 @@ static int process_audio_header_elements(AVFormatContext *s)
         int inSubheader;
         uint8_t byte;
         byte = get_byte(pb);
+        if (!byte)
+            break;
 
         switch (byte) {
         case 0xFD: