diff --git a/core6502/cmos65c02.go b/core6502/cmos65c02.go
index e112002..075bf6b 100644
--- a/core6502/cmos65c02.go
+++ b/core6502/cmos65c02.go
@@ -57,6 +57,9 @@ func add65c02NOPs(opcodes *[256]opcode) {
 		opcodes[i+0x0b] = nop11
 		// BBR and BBS: opcodes[i+0x0f] = nop11
 	}
+
+	// Detection of 65c816
+	opcodes[0xbf].name = "XCE"
 }
 
 var opcodes65c02Delta = [256]opcode{