diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQtAbstractCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQtAbstractCodegen.java
index 6379cabac07..09a45e7a143 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQtAbstractCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQtAbstractCodegen.java
@@ -129,6 +129,9 @@ public abstract class CppQtAbstractCodegen extends AbstractCppCodegen implements
         systemIncludes.add("QDate");
         systemIncludes.add("QDateTime");
         systemIncludes.add("QByteArray");
+
+        reservedWords.add("signals");
+        reservedWords.add("slots");
     }
 
     @Override
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQtClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQtClientCodegen.java
index 785b2ddbebe..7f4a0ad31c5 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQtClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQtClientCodegen.java
@@ -120,6 +120,9 @@ public class CppQtClientCodegen extends CppQtAbstractCodegen implements CodegenC
         typeMapping.put("AnyType", "QJsonValue");
         importMapping.put(PREFIX + "HttpFileElement", "#include \"" + PREFIX + "HttpFileElement.h\"");
         importMapping.put("QJsonValue", "#include <QJsonValue>");
+
+        reservedWords.add("valid");
+        reservedWords.add("set");
     }
 
     @Override