diff --git a/tools/lzcomp.c b/tools/lzcomp.c
index e0a88e44a5f..7d3e0b8fc07 100644
--- a/tools/lzcomp.c
+++ b/tools/lzcomp.c
@@ -310,6 +310,7 @@ void optimize (struct command * commands, unsigned short count) {
         break;
       case 1:
         if (commands -> value != next -> value) break;
+        // falls through
       case 3:
         if ((commands -> count + next -> count) <= 1024) {
           commands -> count += next -> count;