diff --git a/modules/openapi-generator/src/main/resources/cpp-qt5-client/api-body.mustache b/modules/openapi-generator/src/main/resources/cpp-qt5-client/api-body.mustache
index eec363c20d91..ff8137cc23dd 100644
--- a/modules/openapi-generator/src/main/resources/cpp-qt5-client/api-body.mustache
+++ b/modules/openapi-generator/src/main/resources/cpp-qt5-client/api-body.mustache
@@ -101,7 +101,7 @@ void
     {{/isContainer}}{{/bodyParams}}
     {{#headerParams}}
     if ({{paramName}} != nullptr) {
-        input.headers.insert("{{baseName}}", "{{paramName}}");
+        input.headers.insert("{{baseName}}", {{paramName}});
     }
     {{/headerParams}}