diff --git a/src/main/fragment/mos6502-common/vwum1=vwum1_plus_pbuz2_derefidx_vbuyy.asm b/src/main/fragment/mos6502-common/vwum1=vwum1_plus_pbuz2_derefidx_vbuyy.asm
new file mode 100644
index 000000000..b5215c0d0
--- /dev/null
+++ b/src/main/fragment/mos6502-common/vwum1=vwum1_plus_pbuz2_derefidx_vbuyy.asm
@@ -0,0 +1,7 @@
+clc
+lda {m1}
+adc ({z2}),y
+sta {m1}
+bcc !+
+inc {m1}+1
+!:
\ No newline at end of file