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
@@ -90,12 +90,19 @@
     if (SM.getFileID(Loc) != SM.getMainFileID()) {
       return true;
     }
-    if (D->getDeclContext()->Encloses(SelectionDeclContext)) {
-      Results.push_back(D);
-    }
+    Results.push_back(D);
     return true;
   }
 
+  bool TraverseNamespaceDecl(NamespaceDecl *D) {
+    for (auto *Decl : D->decls()) {
+      if (auto *Node = dyn_cast<UsingDecl>(Decl)) {
+        VisitUsingDecl(Node);
+      }
+    }
+    return RecursiveASTVisitor<UsingFinder>::TraverseNamespaceDecl(D);
+  }
+
   bool TraverseDecl(Decl *Node) {
     if (!Node)
       return true;
diff --git a/clang-tools-extra/clangd/unittests/tweaks/AddUsingTests.cpp b/clang-tools-extra/clangd/unittests/tweaks/AddUsingTests.cpp
--- a/clang-tools-extra/clangd/unittests/tweaks/AddUsingTests.cpp
+++ b/clang-tools-extra/clangd/unittests/tweaks/AddUsingTests.cpp
@@ -395,6 +395,28 @@
 
 cc C;
 })cpp"},
+      // Should drop the qualifier in anon namespaces
+      {R"cpp(
+namespace ns { struct Foo; struct Bar; }
+namespace { using ns::Foo; }
+void foo() { ns::^Foo *f; ns::Bar *b;
+})cpp",
+       R"cpp(
+namespace ns { struct Foo; struct Bar; }
+namespace { using ns::Foo; }
+void foo() { Foo *f; ns::Bar *b;
+})cpp"},
+      // Should insert the using decl into the anon namespace
+      {R"cpp(
+namespace ns { struct Foo; struct Bar; }
+namespace { using ns::Foo; }
+void foo() { ns::Foo *f; ns::^Bar *b; }
+)cpp",
+       R"cpp(
+namespace ns { struct Foo; struct Bar; }
+namespace { using ns::Bar;using ns::Foo; }
+void foo() { ns::Foo *f; Bar *b; }
+)cpp"},
       // Type defined in main file, make sure using is after that.
       {R"cpp(
 namespace xx {