diff --git a/apps/talk.c b/apps/talk.c
index 675cfa0966..b94dcf18ee 100644
--- a/apps/talk.c
+++ b/apps/talk.c
@@ -194,7 +194,9 @@ static unsigned char* get_clip(long id, long* p_size)
     unsigned char* clipbuf;
     
     if (id > VOICEONLY_DELIMITER)
-    {   /* voice-only entries use the second part of the table */
+    {   /* voice-only entries use the second part of the table.
+           The first string comes after VOICEONLY_DELIMITER so we need to
+           substract VOICEONLY_DELIMITER + 1 */
         id -= VOICEONLY_DELIMITER + 1;
         if (id >= p_voicefile->id2_max)
             return NULL; /* must be newer than we have */