diff --git a/src/libs/cplusplus/LookupContext.cpp b/src/libs/cplusplus/LookupContext.cpp
index 28fe3d8bcb7..c878f3658aa 100644
--- a/src/libs/cplusplus/LookupContext.cpp
+++ b/src/libs/cplusplus/LookupContext.cpp
@@ -217,13 +217,7 @@ QList<const Name *> LookupContext::fullyQualifiedName(Symbol *symbol, InlineName
 {
     QList<const Name *> qualifiedName = path(symbol->enclosingScope(), policy);
     QList<const Name *> symbolNames;
-    addNames(symbol->name(), &symbolNames, /*add all names*/ true);
-    if (const UsingDeclaration * const usingDecl = symbol->asUsingDeclaration()) {
-        if (!symbolNames.isEmpty())
-            qualifiedName << symbolNames.last();
-    } else {
-        qualifiedName << symbolNames;
-    }
+    addNames(symbol->name(), &qualifiedName, /*add all names*/ true);
     return qualifiedName;
 }
 
@@ -818,7 +812,7 @@ void CreateBindings::lookupInScope(const Name *name, Scope *scope,
                 continue; // skip using namespace directives
             else if (! id->match(s->identifier()))
                 continue;
-            else if (s->name() && s->name()->isQualifiedNameId() && !s->asUsingDeclaration())
+            else if (s->name() && s->name()->isQualifiedNameId())
                 continue; // skip qualified ids.
 
             if (Q_UNLIKELY(debug)) {
diff --git a/src/plugins/cppeditor/cppquickfix_test.cpp b/src/plugins/cppeditor/cppquickfix_test.cpp
index 4ad18cdc963..deeb31ff5ed 100644
--- a/src/plugins/cppeditor/cppquickfix_test.cpp
+++ b/src/plugins/cppeditor/cppquickfix_test.cpp
@@ -4322,6 +4322,7 @@ void Foo::otherFunc()
     QuickFixOperationTest(testDocuments, &factory);
 }
 
+// FIXME: QTCREATORBUG-14524.
 void CppEditorPlugin::test_quickfix_InsertDefFromDecl_usingDecl()
 {
     QList<QuickFixTestDocument::Ptr> testDocuments;
@@ -4346,7 +4347,7 @@ void @func(const S &s);
     expected = R"(
 #include "file.h"
 
-void func(const S &s)
+void func(const N::S &s)
 {
 
 }
@@ -4355,6 +4356,33 @@ void func(const S &s)
 
     InsertDefFromDecl factory;
     QuickFixOperationTest(testDocuments, &factory);
+
+    testDocuments.clear();
+    original = R"(
+namespace N1 {
+namespace N2 { struct S; }
+using N2::S;
+}
+
+void @func(const N1::S &s);
+)";
+    expected = original;
+    testDocuments << QuickFixTestDocument::create("file.h", original, expected);
+
+    // Source File
+    original = R"(
+#include "file.h"
+)";
+    expected = R"(
+#include "file.h"
+
+void func(const N1::N2::S &s)
+{
+
+}
+)";
+    testDocuments << QuickFixTestDocument::create("file.cpp", original, expected);
+    QuickFixOperationTest(testDocuments, &factory);
 }
 
 /// Find right implementation file. (QTCREATORBUG-10728)