Index: lib/AST/ASTImporter.cpp
===================================================================
--- lib/AST/ASTImporter.cpp
+++ lib/AST/ASTImporter.cpp
@@ -2559,6 +2559,9 @@
           if (!IsStructuralMatch(D, FoundRecord, false))
             continue;
 
+        if (!hasSameVisibilityContext(FoundRecord, D))
+          continue;
+
         if (IsStructuralMatch(D, FoundRecord)) {
           RecordDecl *FoundDef = FoundRecord->getDefinition();
           if (D->isThisDeclarationADefinition() && FoundDef) {
Index: unittests/AST/ASTImporterVisibilityTest.cpp
===================================================================
--- unittests/AST/ASTImporterVisibilityTest.cpp
+++ unittests/AST/ASTImporterVisibilityTest.cpp
@@ -31,6 +31,10 @@
   using DeclTy = VarDecl;
   BindableMatcher<Decl> operator()() { return varDecl(hasName("v")); }
 };
+struct GetClassPattern {
+  using DeclTy = CXXRecordDecl;
+  BindableMatcher<Decl> operator()() { return cxxRecordDecl(hasName("X")); }
+};
 
 // Values for the value-parameterized test fixtures.
 // FunctionDecl:
@@ -41,6 +45,9 @@
 const auto *ExternV = "extern int v;";
 const auto *StaticV = "static int v;";
 const auto *AnonV = "namespace { extern int v; }";
+// CXXRecordDecl:
+auto *ExternC = "class X;";
+auto *AnonC = "namespace { class X; }";
 
 // First value in tuple: Compile options.
 // Second value in tuple: Source code to be used in the test.
@@ -84,14 +91,19 @@
 // Manual instantiation of the fixture with each type.
 using ImportFunctionsVisibilityChain = ImportVisibilityChain<GetFunPattern>;
 using ImportVariablesVisibilityChain = ImportVisibilityChain<GetVarPattern>;
-// Value-parameterized test for the first type.
+using ImportClassesVisibilityChain = ImportVisibilityChain<GetClassPattern>;
+// Value-parameterized test for functions.
 TEST_P(ImportFunctionsVisibilityChain, ImportChain) {
   TypedTest_ImportChain();
 }
-// Value-parameterized test for the second type.
+// Value-parameterized test for variables.
 TEST_P(ImportVariablesVisibilityChain, ImportChain) {
   TypedTest_ImportChain();
 }
+// Value-parameterized test for classes.
+TEST_P(ImportClassesVisibilityChain, ImportChain) {
+  TypedTest_ImportChain();
+}
 
 // Automatic instantiation of the value-parameterized tests.
 INSTANTIATE_TEST_CASE_P(ParameterizedTests, ImportFunctionsVisibilityChain,
@@ -110,6 +122,11 @@
         // provided but they must have the same linkage.  See also the test
         // ImportVariableChainInC which test for this special C Lang case.
         ::testing::Values(ExternV, AnonV)), );
+INSTANTIATE_TEST_CASE_P(
+    ParameterizedTests, ImportClassesVisibilityChain,
+    ::testing::Combine(
+        DefaultTestValuesForRunOptions,
+        ::testing::Values(ExternC, AnonC)), );
 
 // First value in tuple: Compile options.
 // Second value in tuple: Tuple with informations for the test.
@@ -169,6 +186,7 @@
 };
 using ImportFunctionsVisibility = ImportVisibility<GetFunPattern>;
 using ImportVariablesVisibility = ImportVisibility<GetVarPattern>;
+using ImportClassesVisibility = ImportVisibility<GetClassPattern>;
 
 // FunctionDecl.
 TEST_P(ImportFunctionsVisibility, ImportAfter) {
@@ -184,6 +202,13 @@
 TEST_P(ImportVariablesVisibility, ImportAfterImport) {
   TypedTest_ImportAfterImport();
 }
+// CXXRecordDecl.
+TEST_P(ImportClassesVisibility, ImportAfter) {
+  TypedTest_ImportAfter();
+}
+TEST_P(ImportClassesVisibility, ImportAfterImport) {
+  TypedTest_ImportAfterImport();
+}
 
 const bool ExpectLink = true;
 const bool ExpectNotLink = false;
@@ -214,6 +239,14 @@
                           std::make_tuple(AnonV, ExternV, ExpectNotLink),
                           std::make_tuple(AnonV, StaticV, ExpectNotLink),
                           std::make_tuple(AnonV, AnonV, ExpectNotLink))), );
+INSTANTIATE_TEST_CASE_P(
+    ParameterizedTests, ImportClassesVisibility,
+    ::testing::Combine(
+        DefaultTestValuesForRunOptions,
+        ::testing::Values(std::make_tuple(ExternC, ExternC, ExpectLink),
+                          std::make_tuple(ExternC, AnonC, ExpectNotLink),
+                          std::make_tuple(AnonC, ExternC, ExpectNotLink),
+                          std::make_tuple(AnonC, AnonC, ExpectNotLink))), );
 
 } // end namespace ast_matchers
 } // end namespace clang