diff --git a/builder/dockerfile/internals.go b/builder/dockerfile/internals.go
index 70a9f44a59..6f0c34c0e8 100644
--- a/builder/dockerfile/internals.go
+++ b/builder/dockerfile/internals.go
@@ -396,7 +396,7 @@ func containsWildcards(name string) bool {
 func (b *Builder) processImageFrom(img builder.Image) error {
 	b.image = img.ID()
 
-	if img.Config != nil {
+	if img.Config() != nil {
 		b.runConfig = img.Config()
 	}