diff --git a/asminc/vic20.inc b/asminc/vic20.inc
index 41a935238..7184ab6ee 100644
--- a/asminc/vic20.inc
+++ b/asminc/vic20.inc
@@ -90,7 +90,7 @@ VIA1_T1LH       := VIA1+$7      ; Timer 1 latch, high byte
 VIA1_T2CL       := VIA1+$8      ; Timer 2, low byte
 VIA1_T2CH       := VIA1+$9      ; Timer 2, high byte
 VIA1_SR         := VIA1+$A      ; Shift register
-VIA1_CR         := VIA1+$B      ; Auxiliary control register
+VIA1_ACR        := VIA1+$B      ; Auxiliary control register
 VIA1_PCR        := VIA1+$C      ; Peripheral control register
 VIA1_IFR        := VIA1+$D      ; Interrupt flag register
 VIA1_IER        := VIA1+$E      ; Interrupt enable register
@@ -112,7 +112,7 @@ VIA2_T1LH       := VIA2+$7      ; Timer 1 latch, high byte
 VIA2_T2CL       := VIA2+$8      ; Timer 2, low byte
 VIA2_T2CH       := VIA2+$9      ; Timer 2, high byte
 VIA2_SR         := VIA2+$A      ; Shift register
-VIA2_CR         := VIA2+$B      ; Auxiliary control register
+VIA2_ACR        := VIA2+$B      ; Auxiliary control register
 VIA2_PCR        := VIA2+$C      ; Peripheral control register
 VIA2_IFR        := VIA2+$D      ; Interrupt flag register
 VIA2_IER        := VIA2+$E      ; Interrupt enable register