diff --git a/libipt/src/pt_block_decoder.c b/libipt/src/pt_block_decoder.c
index 8dffbc2..8f3eb2d 100644
--- a/libipt/src/pt_block_decoder.c
+++ b/libipt/src/pt_block_decoder.c
@@ -2324,6 +2324,9 @@ static int pt_blk_proceed_no_event_cached(struct pt_block_decoder *decoder,
 		}
 
 		/* Fall through to ptbq_decode. */
+#if __GNUC__ >= 7
+		__attribute__ ((fallthrough));
+#endif
 
 	case ptbq_decode: {
 		struct pt_insn_ext iext;