Index: clangd/ClangdUnit.cpp
===================================================================
--- clangd/ClangdUnit.cpp
+++ clangd/ClangdUnit.cpp
@@ -57,6 +57,9 @@
 
   bool HandleTopLevelDecl(DeclGroupRef DG) override {
     for (Decl *D : DG) {
+      if (D->isFromASTFile())
+        continue;
+
       // ObjCMethodDecl are not actually top-level decls.
       if (isa<ObjCMethodDecl>(D))
         continue;
Index: unittests/clangd/ClangdUnitTests.cpp
===================================================================
--- unittests/clangd/ClangdUnitTests.cpp
+++ unittests/clangd/ClangdUnitTests.cpp
@@ -257,6 +257,20 @@
   }
 }
 
+TEST(ClangdUnitTest, TopLevelDecls) {
+  TestTU TU;
+  TU.HeaderCode = R"(
+    int header1();
+    int header2;
+  )";
+  TU.Code = "int main();";
+  auto AST = TU.build();
+  ASSERT_EQ(AST.getLocalTopLevelDecls().size(), 1u);
+  NamedDecl *ND = dyn_cast<NamedDecl>(AST.getLocalTopLevelDecls().front());
+  ASSERT_TRUE(ND);
+  ASSERT_EQ("main", ND->getNameAsString());
+}
+
 } // namespace
 } // namespace clangd
 } // namespace clang