diff --git a/epg.c b/epg.c
index e2b89d8..a28aaee 100644
--- a/epg.c
+++ b/epg.c
@@ -344,7 +344,8 @@ parse(char *epgpath,
 		epg->offset += 4;
 
 		/* Skip padding bytes... */
-		while (epg->bin[epg->offset] == 'U')
+		while (epg->offset < epg->binsize &&
+		    epg->bin[epg->offset] == 'U')
 			epg->offset++;
 	}