diff --git a/clang/lib/Index/IndexDecl.cpp b/clang/lib/Index/IndexDecl.cpp
--- a/clang/lib/Index/IndexDecl.cpp
+++ b/clang/lib/Index/IndexDecl.cpp
@@ -705,6 +705,7 @@
           IndexCtx.handleReference(C->getNamedConcept(), C->getConceptNameLoc(),
                                    Parent, TTP->getLexicalDeclContext());
       } else if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(TP)) {
+        IndexCtx.indexTypeSourceInfo(NTTP->getTypeSourceInfo(), Parent);
         if (NTTP->hasDefaultArgument())
           IndexCtx.indexBody(NTTP->getDefaultArgument(), Parent);
       } else if (const auto *TTPD = dyn_cast<TemplateTemplateParmDecl>(TP)) {
diff --git a/clang/unittests/Index/IndexTests.cpp b/clang/unittests/Index/IndexTests.cpp
--- a/clang/unittests/Index/IndexTests.cpp
+++ b/clang/unittests/Index/IndexTests.cpp
@@ -392,6 +392,20 @@
             Contains(AllOf(QName("MyTypedef"), HasRole(SymbolRole::Reference),
                            WrittenAt(Position(4, 16))))));
 }
+
+TEST(IndexTest, NonTypeTemplateParameter) {
+  std::string Code = R"cpp(
+    enum class Foobar { foo };
+    template <Foobar f>
+    constexpr void func() {}
+  )cpp";
+  auto Index = std::make_shared<Indexer>();
+  tooling::runToolOnCode(std::make_unique<IndexAction>(Index), Code);
+  EXPECT_THAT(Index->Symbols,
+              Contains(AllOf(QName("Foobar"), HasRole(SymbolRole::Reference),
+                             WrittenAt(Position(3, 15)))));
+}
+
 } // namespace
 } // namespace index
 } // namespace clang