diff --git a/clang/lib/AST/ASTImporter.cpp b/clang/lib/AST/ASTImporter.cpp
--- a/clang/lib/AST/ASTImporter.cpp
+++ b/clang/lib/AST/ASTImporter.cpp
@@ -381,7 +381,8 @@
     ExpectedType VisitIncompleteArrayType(const IncompleteArrayType *T);
     ExpectedType VisitVariableArrayType(const VariableArrayType *T);
     ExpectedType VisitDependentSizedArrayType(const DependentSizedArrayType *T);
-    // FIXME: DependentSizedExtVectorType
+    ExpectedType
+    VisitDependentSizedExtVectorType(const DependentSizedExtVectorType *T);
     ExpectedType VisitVectorType(const VectorType *T);
     ExpectedType VisitExtVectorType(const ExtVectorType *T);
     ExpectedType VisitFunctionNoProtoType(const FunctionNoProtoType *T);
@@ -1264,6 +1265,18 @@
       T->getIndexTypeCVRQualifiers(), ToBracketsRange);
 }
 
+ExpectedType ASTNodeImporter::VisitDependentSizedExtVectorType(
+    const DependentSizedExtVectorType *T) {
+  Error Err = Error::success();
+  QualType ToElementType = importChecked(Err, T->getElementType());
+  Expr *ToSizeExpr = importChecked(Err, T->getSizeExpr());
+  SourceLocation ToAttrLoc = importChecked(Err, T->getAttributeLoc());
+  if (Err)
+    return std::move(Err);
+  return Importer.getToContext().getDependentSizedExtVectorType(
+      ToElementType, ToSizeExpr, ToAttrLoc);
+}
+
 ExpectedType ASTNodeImporter::VisitVectorType(const VectorType *T) {
   ExpectedType ToElementTypeOrErr = import(T->getElementType());
   if (!ToElementTypeOrErr)
diff --git a/clang/unittests/AST/ASTImporterFixtures.h b/clang/unittests/AST/ASTImporterFixtures.h
--- a/clang/unittests/AST/ASTImporterFixtures.h
+++ b/clang/unittests/AST/ASTImporterFixtures.h
@@ -260,6 +260,8 @@
                          FromAST->getFileManager(), false);
 
     auto FoundNodes = match(SearchMatcher, FromCtx);
+    if (FoundNodes.empty())
+      return testing::AssertionFailure() << "No node was found!";
     if (FoundNodes.size() != 1)
       return testing::AssertionFailure()
              << "Multiple potential nodes were found!";
diff --git a/clang/unittests/AST/ASTImporterTest.cpp b/clang/unittests/AST/ASTImporterTest.cpp
--- a/clang/unittests/AST/ASTImporterTest.cpp
+++ b/clang/unittests/AST/ASTImporterTest.cpp
@@ -1044,6 +1044,17 @@
                  has(fieldDecl(hasType(dependentSizedArrayType())))))));
 }
 
+TEST_P(ImportExpr, DependentSizedExtVectorType) {
+  MatchVerifier<Decl> Verifier;
+  testImport("template<typename T, int Size>"
+             "class declToImport {"
+             "  typedef T __attribute__((ext_vector_type(Size))) type;"
+             "};",
+             Lang_CXX03, "", Lang_CXX03, Verifier,
+             classTemplateDecl(has(cxxRecordDecl(
+                 has(typedefDecl(hasType(dependentSizedExtVectorType())))))));
+}
+
 TEST_P(ASTImporterOptionSpecificTestBase, ImportUsingPackDecl) {
   Decl *FromTU = getTuDecl(
       "struct A { int operator()() { return 1; } };"