diff --git a/api/go1.6.txt b/api/go1.6.txt
index 109ce7a..d63efd0 100644
--- a/api/go1.6.txt
+++ b/api/go1.6.txt
@@ -186,6 +186,10 @@
 pkg go/constant, func ToInt(Value) Value
 pkg go/constant, type Value interface, ExactString() string
 pkg go/types, method (*Package) SetName(string)
+pkg go/types, type ImportMode int
+pkg go/types, type ImporterFrom interface { Import, ImportFrom }
+pkg go/types, type ImporterFrom interface, Import(string) (*Package, error)
+pkg go/types, type ImporterFrom interface, ImportFrom(string, string, ImportMode) (*Package, error)
 pkg html/template, func IsTrue(interface{}) (bool, bool)
 pkg html/template, method (*Template) DefinedTemplates() string
 pkg image, func NewNYCbCrA(Rectangle, YCbCrSubsampleRatio) *NYCbCrA
diff --git a/src/go/importer/importer.go b/src/go/importer/importer.go
index 1f7b67c..560b853 100644
--- a/src/go/importer/importer.go
+++ b/src/go/importer/importer.go
@@ -50,7 +50,7 @@
 }
 
 // Default returns an Importer for the compiler that built the running binary.
-// If available, the result implements types.Importer2.
+// If available, the result implements types.ImporterFrom.
 func Default() types.Importer {
 	return For(runtime.Compiler, nil)
 }
@@ -60,10 +60,10 @@
 type gcimports map[string]*types.Package
 
 func (m gcimports) Import(path string) (*types.Package, error) {
-	return m.Import2(path, "" /* no vendoring */, 0)
+	return m.ImportFrom(path, "" /* no vendoring */, 0)
 }
 
-func (m gcimports) Import2(path, srcDir string, mode types.ImportMode) (*types.Package, error) {
+func (m gcimports) ImportFrom(path, srcDir string, mode types.ImportMode) (*types.Package, error) {
 	if mode != 0 {
 		panic("mode must be 0")
 	}
@@ -78,10 +78,10 @@
 }
 
 func (m *gccgoimports) Import(path string) (*types.Package, error) {
-	return m.Import2(path, "" /* no vendoring */, 0)
+	return m.ImportFrom(path, "" /* no vendoring */, 0)
 }
 
-func (m *gccgoimports) Import2(path, srcDir string, mode types.ImportMode) (*types.Package, error) {
+func (m *gccgoimports) ImportFrom(path, srcDir string, mode types.ImportMode) (*types.Package, error) {
 	if mode != 0 {
 		panic("mode must be 0")
 	}
diff --git a/src/go/types/api.go b/src/go/types/api.go
index 1adcdf9..ca109f0 100644
--- a/src/go/types/api.go
+++ b/src/go/types/api.go
@@ -54,37 +54,37 @@
 // An Importer resolves import paths to Packages.
 //
 // CAUTION: This interface does not support the import of locally
-// vendored packages. See also https://golang.org/s/go15vendor.
-// If possible, external implementations should implement Importer2.
+// vendored packages. See https://golang.org/s/go15vendor.
+// If possible, external implementations should implement ImporterFrom.
 type Importer interface {
 	// Import returns the imported package for the given import
 	// path, or an error if the package couldn't be imported.
-	// Two calls to Import with the same path and srcDir return
-	// the same package.
+	// Two calls to Import with the same path return the same
+	// package.
 	Import(path string) (*Package, error)
 }
 
 // ImportMode is reserved for future use.
 type ImportMode int
 
-// An Importer2 resolves import paths to packages; it
+// An ImporterFrom resolves import paths to packages; it
 // supports vendoring per https://golang.org/s/go15vendor.
-// Use go/importer to obtain an Importer2 implementation.
-type Importer2 interface {
+// Use go/importer to obtain an ImporterFrom implementation.
+type ImporterFrom interface {
 	// Importer is present for backward-compatibility. Calling
-	// Import(path) is the same as calling Import(path, "", 0);
+	// Import(path) is the same as calling ImportFrom(path, "", 0);
 	// i.e., locally vendored packages may not be found.
-	// The types package does not call Import if an Importer2
+	// The types package does not call Import if an ImporterFrom
 	// is present.
 	Importer
 
-	// Import2 returns the imported package for the given import
+	// ImportFrom returns the imported package for the given import
 	// path when imported by the package in srcDir, or an error
 	// if the package couldn't be imported. The mode value must
 	// be 0; it is reserved for future use.
-	// Two calls to Import2 with the same path and srcDir return
+	// Two calls to ImportFrom with the same path and srcDir return
 	// the same package.
-	Import2(path, srcDir string, mode ImportMode) (*Package, error)
+	ImportFrom(path, srcDir string, mode ImportMode) (*Package, error)
 }
 
 // A Config specifies the configuration for type checking.
@@ -114,8 +114,8 @@
 
 	// An importer is used to import packages referred to from
 	// import declarations.
-	// If the installed importer implements Importer2, the type
-	// checker calls Import2 instead of Import.
+	// If the installed importer implements ImporterFrom, the type
+	// checker calls ImportFrom instead of Import.
 	// The type checker reports an error if an importer is needed
 	// but none was installed.
 	Importer Importer
diff --git a/src/go/types/resolver.go b/src/go/types/resolver.go
index 56ee5e1..14148a5 100644
--- a/src/go/types/resolver.go
+++ b/src/go/types/resolver.go
@@ -187,10 +187,10 @@
 							// ordinary import
 							if importer := check.conf.Importer; importer == nil {
 								err = fmt.Errorf("Config.Importer not installed")
-							} else if importer2, ok := importer.(Importer2); ok {
-								imp, err = importer2.Import2(path, srcDir, 0)
+							} else if importerFrom, ok := importer.(ImporterFrom); ok {
+								imp, err = importerFrom.ImportFrom(path, srcDir, 0)
 								if imp == nil && err == nil {
-									err = fmt.Errorf("Config.Importer.Import2(%s, %s, 0) returned nil but no error", path, pkg.path)
+									err = fmt.Errorf("Config.Importer.ImportFrom(%s, %s, 0) returned nil but no error", path, pkg.path)
 								}
 							} else {
 								imp, err = importer.Import(path)
diff --git a/src/go/types/resolver_test.go b/src/go/types/resolver_test.go
index 9ffbd0c..4bb63b6 100644
--- a/src/go/types/resolver_test.go
+++ b/src/go/types/resolver_test.go
@@ -18,7 +18,7 @@
 )
 
 type resolveTestImporter struct {
-	importer Importer2
+	importer ImporterFrom
 	imported map[string]bool
 }
 
@@ -26,15 +26,15 @@
 	panic("should not be called")
 }
 
-func (imp *resolveTestImporter) Import2(path, srcDir string, mode ImportMode) (*Package, error) {
+func (imp *resolveTestImporter) ImportFrom(path, srcDir string, mode ImportMode) (*Package, error) {
 	if mode != 0 {
 		panic("mode must be 0")
 	}
 	if imp.importer == nil {
-		imp.importer = importer.Default().(Importer2)
+		imp.importer = importer.Default().(ImporterFrom)
 		imp.imported = make(map[string]bool)
 	}
-	pkg, err := imp.importer.Import2(path, srcDir, mode)
+	pkg, err := imp.importer.ImportFrom(path, srcDir, mode)
 	if err != nil {
 		return nil, err
 	}