diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 42d50f63571..f5e7f8bd511 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -4617,8 +4617,9 @@ void Tokenizer::setVarIdPass1()
                         if (!(scopeStack.top().isStructInit || tok->strAt(-1) == "="))
                             variableMap.enterScope();
                     }
+                    const bool isStructInit = scopeStack.top().isStructInit || tok->strAt(-1) == "=" || (initlist && !Token::Match(tok->tokAt(-1), "[)}]"));
+                    scopeStack.emplace(isExecutable, isStructInit, isEnumStart(tok), variableMap.getVarId());
                     initlist = false;
-                    scopeStack.emplace(isExecutable, scopeStack.top().isStructInit || tok->strAt(-1) == "=", isEnumStart(tok), variableMap.getVarId());
                 } else { /* if (tok->str() == "}") */
                     bool isNamespace = false;
                     for (const Token *tok1 = tok->link()->previous(); tok1 && tok1->isName(); tok1 = tok1->previous()) {
diff --git a/test/testvarid.cpp b/test/testvarid.cpp
index 02ea62f6f3d..6399f2a1405 100644
--- a/test/testvarid.cpp
+++ b/test/testvarid.cpp
@@ -2508,6 +2508,16 @@ class TestVarID : public TestFixture {
                       "5: A :: A ( const Matrix & m@3 ) throw ( e ) : work@1 ( 0 )\n"
                       "6: { }\n",
                       tokenize(code10));
+
+        const char code11[] = "struct S {\n" // #12733
+                              "    explicit S(int& r) : a{ int{ 1 } }, b{ r } {}\n"
+                              "    int a, &b;\n"
+                              "};";
+        ASSERT_EQUALS("1: struct S {\n"
+                      "2: explicit S ( int & r@1 ) : a@2 { int { 1 } } , b@3 { r@1 } { }\n"
+                      "3: int a@2 ; int & b@3 ;\n"
+                      "4: } ;\n",
+                      tokenize(code11));
     }
 
     void varid_initListWithBaseTemplate() {