diff --git a/clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp b/clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp
--- a/clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp
+++ b/clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp
@@ -274,6 +274,8 @@
   } else if (auto *T = Node->ASTNode.get<TypeLoc>()) {
     if (auto E = T->getAs<ElaboratedTypeLoc>()) {
       QualifierToRemove = E.getQualifierLoc();
+      if (!QualifierToRemove)
+        return false;
 
       auto SpelledTokens =
           TB.spelledForExpanded(TB.expandedTokens(E.getSourceRange()));
diff --git a/clang-tools-extra/clangd/unittests/TweakTests.cpp b/clang-tools-extra/clangd/unittests/TweakTests.cpp
--- a/clang-tools-extra/clangd/unittests/TweakTests.cpp
+++ b/clang-tools-extra/clangd/unittests/TweakTests.cpp
@@ -2523,6 +2523,9 @@
   // Do not offer code action on typo-corrections.
   EXPECT_UNAVAILABLE(Header + "/*error-ok*/c^c C;");
 
+  // NestedNameSpecifier, but no namespace.
+  EXPECT_UNAVAILABLE(Header + "class Foo {}; class F^oo foo;");
+
   // Check that we do not trigger in header files.
   FileName = "test.h";
   ExtraArgs.push_back("-xc++-header"); // .h file is treated a C by default.