diff --git a/x65.cpp b/x65.cpp
index 453ae84..c55fede 100644
--- a/x65.cpp
+++ b/x65.cpp
@@ -415,7 +415,7 @@ enum AddrMode {
 	// 6502 illegal modes
 	AMM_SLO = AMM_ZP | AMM_ZP_X | AMM_ABS | AMM_ABS_Y | AMM_ABS_X | AMM_ZP_REL_X | AMM_ZP_Y_REL,
 	AMM_SAX = AMM_FLIPXY | AMM_ZP | AMM_ZP_X | AMM_ZP_REL_X | AMM_ABS,
-	AMM_LAX = AMM_FLIPXY | AMM_ZP | AMM_ZP_X | AMM_ZP_REL_X | AMM_ABS | AMM_ABS_X,
+	AMM_LAX = AMM_FLIPXY | AMM_ZP | AMM_ZP_X | AMM_ZP_REL_X | AMM_ABS | AMM_ABS_X | AMM_ZP_Y_REL,
 	AMM_AHX = AMM_FLIPXY | AMM_ZP_REL_X | AMM_ABS_X,
 	AMM_SHY = AMM_ABS_X,
 	AMM_SHX = AMM_ABS_Y,