diff --git a/lib/valueflow.cpp b/lib/valueflow.cpp
index f824826c0..e61ab45c0 100644
--- a/lib/valueflow.cpp
+++ b/lib/valueflow.cpp
@@ -8085,6 +8085,15 @@ static std::vector<ValueFlow::Value> getContainerSizeFromConstructorArgs(const s
     return {};
 }
 
+static bool valueFlowIsSameContainerType(const ValueType& contType, const Token* tok, const Settings* settings)
+{
+    if (!tok || !tok->valueType() || !tok->valueType()->containerTypeToken)
+        return false;
+
+    const ValueType tokType = ValueType::parseDecl(tok->valueType()->containerTypeToken, settings, true);
+    return contType.isTypeEqual(&tokType);
+}
+
 static std::vector<ValueFlow::Value> getInitListSize(const Token* tok,
                                                      const ValueType* valueType,
                                                      const Settings* settings,
@@ -8108,6 +8117,8 @@ static std::vector<ValueFlow::Value> getInitListSize(const Token* tok,
                 initList = true;
             else if (vt.isIntegral() && astIsIntegral(args[0], false))
                 initList = true;
+            else if (args.size() == 1 && valueFlowIsSameContainerType(vt, tok->astOperand2(), settings))
+                initList = false; // copy ctor
         }
     }
     if (!initList)
diff --git a/test/testvalueflow.cpp b/test/testvalueflow.cpp
index fe872ff2b..5b2cb58e4 100644
--- a/test/testvalueflow.cpp
+++ b/test/testvalueflow.cpp
@@ -6317,6 +6317,22 @@ private:
                "    return x;\n"
                "}\n";
         ASSERT_EQUALS(false, testValueOfX(code, 5U, 0));
+
+        code = "std::vector<int> g();\n" // #11417
+               "int f() {\n"
+               "    std::vector<int> v{ g() };\n"
+               "    auto x = v.size();\n"
+               "    return x;\n"
+               "}\n";
+        ASSERT_EQUALS(false, testValueOfXKnown(code, 5U, 1));
+
+        code = "std::vector<int> g();\n"
+               "int f() {\n"
+               "    std::vector<std::vector<int>> v{ g() };\n"
+               "    auto x = v.size();\n"
+               "    return x;\n"
+               "}\n";
+        ASSERT_EQUALS(true, testValueOfXKnown(code, 5U, 1));
     }
 
     void valueFlowContainerElement()