diff --git a/wip-hugo/routines/memory/memset_alt.s b/wip-hugo/routines/memory/memset_alt.s
index 40b7b50..b2c50b9 100644
--- a/wip-hugo/routines/memory/memset_alt.s
+++ b/wip-hugo/routines/memory/memset_alt.s
@@ -36,9 +36,9 @@ small_set:
         STX length + 1
         ;; 3 bytes = STA DEY NOP = seting 1 byte of memory.
         ;; So we need to calculate: length*3
-        Mult_16 length, length + 1
-        ; A=  length_copy
-        ADC length
+        Mult_16 A, length + 1
+        ; A=  length
+        ADC length_copy
         TAY
         LDA length + 1
         ADC #$00