diff --git a/src/vim9instr.c b/src/vim9instr.c
index 88bd2ca..49f8c52 100644
--- a/src/vim9instr.c
+++ b/src/vim9instr.c
@@ -132,15 +132,16 @@
 }
 
 /*
- * Generate ISN_OBJ_MEMBER - access object member by indes.
+ * Generate ISN_GET_OBJ_MEMBER - access member of object at bottom of stack by
+ * index.
  */
     int
-generate_OBJ_MEMBER(cctx_T *cctx, int idx, type_T *type)
+generate_GET_OBJ_MEMBER(cctx_T *cctx, int idx, type_T *type)
 {
     RETURN_OK_IF_SKIP(cctx);
 
     // drop the object type
-    isn_T *isn = generate_instr_drop(cctx, ISN_OBJ_MEMBER, 1);
+    isn_T *isn = generate_instr_drop(cctx, ISN_GET_OBJ_MEMBER, 1);
     if (isn == NULL)
 	return FAIL;
 
@@ -149,6 +150,24 @@
 }
 
 /*
+ * Generate ISN_STORE_THIS - store value in member of "this" object with member
+ * index "idx".
+ */
+    int
+generate_STORE_THIS(cctx_T *cctx, int idx)
+{
+    RETURN_OK_IF_SKIP(cctx);
+
+    // drop the value type
+    isn_T *isn = generate_instr_drop(cctx, ISN_STORE_THIS, 1);
+    if (isn == NULL)
+	return FAIL;
+
+    isn->isn_arg.number = idx;
+    return OK;
+}
+
+/*
  * If type at "offset" isn't already VAR_STRING then generate ISN_2STRING.
  * But only for simple types.
  * When "tolerant" is TRUE convert most types to string, e.g. a List.
@@ -2458,6 +2477,7 @@
 	case ISN_FINISH:
 	case ISN_FOR:
 	case ISN_GETITEM:
+	case ISN_GET_OBJ_MEMBER:
 	case ISN_JUMP:
 	case ISN_JUMP_IF_ARG_SET:
 	case ISN_LISTAPPEND:
@@ -2477,7 +2497,6 @@
 	case ISN_NEWDICT:
 	case ISN_NEWLIST:
 	case ISN_NEWPARTIAL:
-	case ISN_OBJ_MEMBER:
 	case ISN_OPANY:
 	case ISN_OPFLOAT:
 	case ISN_OPNR:
@@ -2495,8 +2514,8 @@
 	case ISN_REDIREND:
 	case ISN_REDIRSTART:
 	case ISN_RETURN:
-	case ISN_RETURN_VOID:
 	case ISN_RETURN_OBJECT:
+	case ISN_RETURN_VOID:
 	case ISN_SHUFFLE:
 	case ISN_SLICE:
 	case ISN_SOURCE:
@@ -2504,6 +2523,7 @@
 	case ISN_STOREINDEX:
 	case ISN_STORENR:
 	case ISN_STOREOUTER:
+	case ISN_STORE_THIS:
 	case ISN_STORERANGE:
 	case ISN_STOREREG:
 	case ISN_STOREV: