diff --git a/Python/ceval.c b/Python/ceval.c
index d74d017..1af998d 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -2002,6 +2002,18 @@
 			if (x != NULL) continue;
 			break;
 
+		case STORE_MAP:
+			w = TOP();     /* key */
+			u = SECOND();  /* value */
+			v = THIRD();   /* dict */
+			STACKADJ(-2);
+			assert (PyDict_CheckExact(v));
+			err = PyDict_SetItem(v, w, u);  /* v[w] = u */
+			Py_DECREF(u);
+			Py_DECREF(w);
+			if (err == 0) continue;
+			break;
+
 		case LOAD_ATTR:
 			w = GETITEM(names, oparg);
 			v = TOP();