diff --git a/libsrc/common/getcpu.s b/libsrc/common/getcpu.s
index 2acff0635..169c56bbd 100644
--- a/libsrc/common/getcpu.s
+++ b/libsrc/common/getcpu.s
@@ -52,7 +52,7 @@ _getcpu:
         clc
         adc     #1              ; $01+$09 = $10 on 6502, $01+$09 = $0A on 2a03/2a07
         cld
-        cmp     #10
+        cmp     #$0a
         beq     @L5
         lda     #0              ; CPU_6502 constant
         beq     @L9