diff --git a/src/cmd/compile/internal/gc/fmt.go b/src/cmd/compile/internal/gc/fmt.go
index 598930bf15..75194ca6f0 100644
--- a/src/cmd/compile/internal/gc/fmt.go
+++ b/src/cmd/compile/internal/gc/fmt.go
@@ -1599,7 +1599,7 @@ func (n *Node) nodedump(s fmt.State, flag FmtFlag, mode fmtMode) {
 
 	case OTYPE:
 		mode.Fprintf(s, "%v %v%j type=%v", n.Op, n.Sym, n, n.Type)
-		if recur && n.Type == nil && n.Name.Param.Ntype != nil {
+		if recur && n.Type == nil && n.Name != nil && n.Name.Param != nil && n.Name.Param.Ntype != nil {
 			indent(s)
 			mode.Fprintf(s, "%v-ntype%v", n.Op, n.Name.Param.Ntype)
 		}