diff --git a/util/cbfstool/lz4/lib/lz4frame.c b/util/cbfstool/lz4/lib/lz4frame.c
index f984b27..1505875 100644
--- a/util/cbfstool/lz4/lib/lz4frame.c
+++ b/util/cbfstool/lz4/lib/lz4frame.c
@@ -1092,6 +1092,7 @@ size_t LZ4F_decompress(LZ4F_decompressionContext_t decompressionContext,
                 dctxPtr->dStage = dstage_storeHeader;
             }
 	    /* Falls through. */
+            __attribute__ ((fallthrough));
         case dstage_storeHeader:
             {
                 size_t sizeToCopy = dctxPtr->tmpInTarget - dctxPtr->tmpInSize;