diff --git a/src/cmd/compile/internal/types/size.go b/src/cmd/compile/internal/types/size.go
index a47a26da74a..0f3db06c1de 100644
--- a/src/cmd/compile/internal/types/size.go
+++ b/src/cmd/compile/internal/types/size.go
@@ -357,7 +357,7 @@ func CalcSize(t *Type) {
 		return
 	}
 
-	if t.WidthCalculated() {
+	if t.widthCalculated() {
 		return
 	}
 
@@ -570,6 +570,10 @@ func RecalcSize(t *Type) {
 	CalcSize(t)
 }
 
+func (t *Type) widthCalculated() bool {
+	return t.align > 0
+}
+
 // when a type's width should be known, we call CheckSize
 // to compute it.  during a declaration like
 //
diff --git a/src/cmd/compile/internal/types/type.go b/src/cmd/compile/internal/types/type.go
index c510a705f20..8fb8fb377f0 100644
--- a/src/cmd/compile/internal/types/type.go
+++ b/src/cmd/compile/internal/types/type.go
@@ -1060,7 +1060,7 @@ func (t *Type) SetFields(fields []*Field) {
 	// Rather than try to track and invalidate those,
 	// enforce that SetFields cannot be called once
 	// t's width has been calculated.
-	if t.WidthCalculated() {
+	if t.widthCalculated() {
 		base.Fatalf("SetFields of %v: width previously calculated", t)
 	}
 	t.wantEtype(TSTRUCT)
@@ -1084,10 +1084,6 @@ func (t *Type) SetInterface(methods []*Field) {
 	t.Methods().Set(methods)
 }
 
-func (t *Type) WidthCalculated() bool {
-	return t.align > 0
-}
-
 // ArgWidth returns the total aligned argument size for a function.
 // It includes the receiver, parameters, and results.
 func (t *Type) ArgWidth() int64 {