diff --git a/src/cmd/compile/internal/gc/lex.go b/src/cmd/compile/internal/gc/lex.go
index 46b7d5da16..afc5de95c5 100644
--- a/src/cmd/compile/internal/gc/lex.go
+++ b/src/cmd/compile/internal/gc/lex.go
@@ -370,7 +370,7 @@ func Main() {
 	defercheckwidth()
 
 	for l := xtop; l != nil; l = l.Next {
-		if l.N.Op != ODCL && l.N.Op != OAS {
+		if l.N.Op != ODCL && l.N.Op != OAS && l.N.Op != OAS2 {
 			typecheck(&l.N, Etop)
 		}
 	}
@@ -378,7 +378,7 @@ func Main() {
 	// Phase 2: Variable assignments.
 	//   To check interface assignments, depends on phase 1.
 	for l := xtop; l != nil; l = l.Next {
-		if l.N.Op == ODCL || l.N.Op == OAS {
+		if l.N.Op == ODCL || l.N.Op == OAS || l.N.Op == OAS2 {
 			typecheck(&l.N, Etop)
 		}
 	}
diff --git a/test/fixedbugs/issue10977.go b/test/fixedbugs/issue10977.go
new file mode 100644
index 0000000000..0b18c70005
--- /dev/null
+++ b/test/fixedbugs/issue10977.go
@@ -0,0 +1,20 @@
+// compile
+
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+type T struct{}
+
+var (
+	t = T{}
+	u = t.New()
+)
+
+func x(T) (int, int) { return 0, 0 }
+
+var _, _ = x(u)
+
+func (T) New() T { return T{} }