diff --git a/lib/checkclass.cpp b/lib/checkclass.cpp
index c1f5e9fd7..c2879a6a9 100644
--- a/lib/checkclass.cpp
+++ b/lib/checkclass.cpp
@@ -161,7 +161,7 @@ void CheckClass::constructors()
                 if (usage[count].assign || usage[count].init || var.isStatic())
                     continue;
 
-                if (var.valueType()->pointer == 0 && var.type() && var.type()->needInitialization == Type::False)
+                if (var.valueType()->pointer == 0 && var.type() && var.type()->needInitialization == Type::False && var.type()->derivedFrom.empty())
                     continue;
 
                 if (var.isConst() && func.isOperator()) // We can't set const members in assignment operator
@@ -193,7 +193,7 @@ void CheckClass::constructors()
                 bool inconclusive = false;
                 // Don't warn about unknown types in copy constructors since we
                 // don't know if they can be copied or not..
-                if ((func.type == Function::eCopyConstructor || func.type == Function::eOperatorEqual) && !isVariableCopyNeeded(var))
+                if ((func.type == Function::eCopyConstructor || func.type == Function::eMoveConstructor || func.type == Function::eOperatorEqual) && !isVariableCopyNeeded(var))
                     inconclusive = true;
 
                 if (!printInconclusive && inconclusive)
diff --git a/test/testconstructors.cpp b/test/testconstructors.cpp
index 42bb82323..61924bc0f 100644
--- a/test/testconstructors.cpp
+++ b/test/testconstructors.cpp
@@ -1356,6 +1356,25 @@ private:
               "};");
         ASSERT_EQUALS("", errout.str());
 
+        check("class A : public std::vector<int>\n"
+              "{\n"
+              "public:\n"
+              "    A(const A &a);\n"
+              "};\n"
+              "class B\n"
+              "{\n"
+              "    A a;\n"
+              "public:\n"
+              "    B(){}\n"
+              "    B(const B&){}\n"
+              "    B(B &&){}\n"
+              "    const B& operator=(const B&){return *this;}\n"
+              "};", true);
+        ASSERT_EQUALS("[test.cpp:11]: (warning, inconclusive) Member variable 'B::a' is not initialized in the constructor.\n"
+                      "[test.cpp:12]: (warning, inconclusive) Member variable 'B::a' is not initialized in the constructor.\n"
+                      "[test.cpp:13]: (warning, inconclusive) Member variable 'B::a' is not assigned a value in 'B::operator='.\n",
+                      errout.str());
+
         check("class B\n"
               "{\n"
               "public:\n"