diff --git a/src/instruction.c b/src/instruction.c
index 420cce2..0c54676 100644
--- a/src/instruction.c
+++ b/src/instruction.c
@@ -56,6 +56,9 @@ instruction_print(instruction_t *i)
 	case IMPLIED:
 		printf("%s", i->def.mnemonic);
 		break;
+	case ACCUMULATOR:
+		printf("%s A", i->def.mnemonic);
+		break;
 	case IMMEDIATE:
 		printf("%s #%X", i->def.mnemonic, i->op1);
 		break;
diff --git a/src/instruction.h b/src/instruction.h
index 819f106..fabbced 100644
--- a/src/instruction.h
+++ b/src/instruction.h
@@ -15,7 +15,8 @@ typedef enum {
 	ABSOLUTEX,
 	ABSOLUTEY,
 	IABSOLUTE,
-	IABSOLUTEX
+	IABSOLUTEX,
+	ACCUMULATOR
 } addressing_t;
 
 struct instrdef {