diff --git a/Include/opcode.h b/Include/opcode.h
index 2816369..9f20b56 100644
--- a/Include/opcode.h
+++ b/Include/opcode.h
@@ -45,6 +45,7 @@
 #define DELETE_SLICE	50
 /* Also uses 51-53 */
 
+#define STORE_MAP	54
 #define INPLACE_ADD	55
 #define INPLACE_SUBTRACT	56
 #define INPLACE_MULTIPLY	57