diff --git a/asminc/rp6502.inc b/asminc/rp6502.inc
index 69292b4aa..1d850ec80 100644
--- a/asminc/rp6502.inc
+++ b/asminc/rp6502.inc
@@ -34,7 +34,7 @@ RIA_OP_EXIT               := $FF
 RIA_OP_ZXSTACK            := $00
 RIA_OP_XREG               := $01
 RIA_OP_PHI2               := $02
-RIA_OP_CODEPAGE           := $03
+RIA_OP_CODE_PAGE          := $03
 RIA_OP_LRAND              := $04
 RIA_OP_STDIN_OPT          := $05
 RIA_OP_ERRNO_OPT          := $06