diff --git a/clang-tools-extra/clangd/index/SymbolCollector.cpp b/clang-tools-extra/clangd/index/SymbolCollector.cpp
--- a/clang-tools-extra/clangd/index/SymbolCollector.cpp
+++ b/clang-tools-extra/clangd/index/SymbolCollector.cpp
@@ -789,6 +789,16 @@
     // Conservatively refuse to insert #includes to files without guards.
     return llvm::None;
   }
+  // Store system includes as verbatim. This enables making use of the same
+  // index in different environments, e.g. a system header like <linux/dlm.h>
+  // might resolve to different absolute paths, but the path relative to sysroot
+  // will be the same.
+  bool IsSystem = false;
+  auto ShorterInclude =
+      PP->getHeaderSearchInfo().suggestPathToFileForDiagnostics(FE, "",
+                                                                &IsSystem);
+  if (IsSystem)
+    return "<" + ShorterInclude + ">";
   // Standard case: just insert the file itself.
   return toURI(SM, Filename, Opts);
 }
diff --git a/clang-tools-extra/clangd/unittests/SymbolCollectorTests.cpp b/clang-tools-extra/clangd/unittests/SymbolCollectorTests.cpp
--- a/clang-tools-extra/clangd/unittests/SymbolCollectorTests.cpp
+++ b/clang-tools-extra/clangd/unittests/SymbolCollectorTests.cpp
@@ -1446,6 +1446,20 @@
               UnorderedElementsAre(IncludeHeaderWithRef(TestHeaderURI, 1u)));
 }
 
+TEST_F(SymbolCollectorTest, IncludeHeaderFromSystemIsVerbatim) {
+  llvm::StringRef HeaderName = "header.h";
+  TestHeaderName = testPath(HeaderName);
+  TestHeaderURI = URI::create(TestHeaderName).toString();
+  CollectorOpts.CollectIncludePath = true;
+  runSymbolCollector("#pragma once\nclass Foo {};", /*Main=*/"",
+                     {"-isystem", testRoot()});
+  EXPECT_THAT(Symbols, UnorderedElementsAre(
+                           AllOf(QName("Foo"), DeclURI(TestHeaderURI))));
+  EXPECT_THAT(Symbols.begin()->IncludeHeaders,
+              UnorderedElementsAre(
+                  IncludeHeaderWithRef("<" + HeaderName.str() + ">", 1u)));
+}
+
 TEST_F(SymbolCollectorTest, CanonicalSTLHeader) {
   CollectorOpts.CollectIncludePath = true;
   CanonicalIncludes Includes;