diff --git a/skeletons/ber_decoder.c b/skeletons/ber_decoder.c
index a7543bb..f0a3551 100644
--- a/skeletons/ber_decoder.c
+++ b/skeletons/ber_decoder.c
@@ -173,8 +173,11 @@
 			/*
 			 * Unexpected tag. Too bad.
 			 */
-		    	ASN_DEBUG("Expected: %s, expectation failed",
-				ber_tlv_tag_string(td->tags[tagno]));
+		    	ASN_DEBUG("Expected: %s, "
+				"expectation failed (tn=%d, tm=%d)",
+				ber_tlv_tag_string(td->tags[tagno]),
+				tagno, tag_mode
+			);
 			RETURN(RC_FAIL);
 		    }
 		}