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
@@ -644,6 +644,7 @@
     ExpectedStmt VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *E);
     ExpectedStmt VisitTypeTraitExpr(TypeTraitExpr *E);
     ExpectedStmt VisitCXXTypeidExpr(CXXTypeidExpr *E);
+    ExpectedStmt VisitCXXFoldExpr(CXXFoldExpr *E);
 
     template<typename IIter, typename OIter>
     Error ImportArrayChecked(IIter Ibegin, IIter Iend, OIter Obegin) {
@@ -8011,6 +8012,25 @@
       *ToTypeOrErr, *ToExprOperandOrErr, *ToSourceRangeOrErr);
 }
 
+ExpectedStmt ASTNodeImporter::VisitCXXFoldExpr(CXXFoldExpr *E) {
+  Error Err = Error::success();
+
+  auto ToType = importChecked(Err, E->getType());
+  auto ToCallee = importChecked(Err, E->getCallee());
+  auto ToLParenLoc = importChecked(Err, E->getLParenLoc());
+  auto ToLHS = importChecked(Err, E->getLHS());
+  auto ToEllipsisLoc = importChecked(Err, E->getEllipsisLoc());
+  auto ToRHS = importChecked(Err, E->getRHS());
+  auto ToRParenLoc = importChecked(Err, E->getRParenLoc());
+
+  if (Err)
+    return std::move(Err);
+
+  return new (Importer.getToContext())
+      CXXFoldExpr(ToType, ToCallee, ToLParenLoc, ToLHS, E->getOperator(),
+                  ToEllipsisLoc, ToRHS, ToRParenLoc, E->getNumExpansions());
+}
+
 Error ASTNodeImporter::ImportOverriddenMethods(CXXMethodDecl *ToMethod,
                                                CXXMethodDecl *FromMethod) {
   Error ImportErrors = Error::success();
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
@@ -639,6 +639,22 @@
           hasUnqualifiedDesugaredType(constantArrayType(hasSize(7))))))))));
 }
 
+const internal::VariadicDynCastAllOfMatcher<Stmt, CXXFoldExpr> cxxFoldExpr;
+
+TEST_P(ImportExpr, ImportCXXFoldExpr) {
+  MatchVerifier<Decl> Verifier;
+  testImport("template <typename... Ts>"
+             "void declToImport(Ts... args) {"
+             "  const int i1 = (... + args);"
+             "  const int i2 = (1 + ... + args);"
+             "  const int i3 = (args + ...);"
+             "  const int i4 = (args + ... + 1);"
+             "};"
+             "void g() { declToImport(1, 2, 3, 4, 5); }",
+             Lang_CXX17, "", Lang_CXX17, Verifier,
+             functionTemplateDecl(hasDescendant(cxxFoldExpr())));
+}
+
 /// \brief Matches __builtin_types_compatible_p:
 /// GNU extension to check equivalent types
 /// Given