diff --git a/c64/kernal/membot.s b/c64/kernal/membot.s
index 086545c0..84e6ce44 100644
--- a/c64/kernal/membot.s
+++ b/c64/kernal/membot.s
@@ -12,13 +12,14 @@ MEMBOT:
 
 	bcc membot_set
 	
-	ldx MEMSTR+0
 	ldy MEMSTR+1
-	rts
+	ldx MEMSTR+0
+
+	// FALLTROUGH
 
 membot_set:
 
+	sty MEMSTR+1
 	stx MEMSTR+0
-	stx MEMSTR+1
 	
 	rts
diff --git a/c64/kernal/memtop.s b/c64/kernal/memtop.s
index dd50497a..485112a0 100644
--- a/c64/kernal/memtop.s
+++ b/c64/kernal/memtop.s
@@ -14,7 +14,8 @@ MEMTOP:
 	
 	ldy MEMSIZK+1
 	ldx MEMSIZK+0
-	rts
+
+	// FALLTROUGH
 
 memtop_set: