diff --git a/src/cmd/compile/internal/typecheck/const.go b/src/cmd/compile/internal/typecheck/const.go
index c60d36ba62f..9b3a27b2d80 100644
--- a/src/cmd/compile/internal/typecheck/const.go
+++ b/src/cmd/compile/internal/typecheck/const.go
@@ -794,7 +794,7 @@ func (s *constSet) add(pos src.XPos, n ir.Node, what, where string) {
 		}
 	}
 
-	if !ir.IsConstNode(n) {
+	if !ir.IsConstNode(n) || n.Type() == nil {
 		return
 	}
 	if n.Type().IsUntyped() {
diff --git a/test/fixedbugs/issue44432.go b/test/fixedbugs/issue44432.go
new file mode 100644
index 00000000000..c5fb67e0d78
--- /dev/null
+++ b/test/fixedbugs/issue44432.go
@@ -0,0 +1,13 @@
+// errorcheck -G=0 -d=panic
+
+// Copyright 2021 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
+
+var m = map[string]int{
+	"a": 1,
+	1:   1, // ERROR "cannot use 1.*as type string in map key"
+	2:   2, // ERROR "cannot use 2.*as type string in map key"
+}