diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQt5AbstractCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQt5AbstractCodegen.java
index 88d29c2c5050..7dcd055d9aa1 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQt5AbstractCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQt5AbstractCodegen.java
@@ -78,6 +78,7 @@ public CppQt5AbstractCodegen() {
         typeMapping.put("integer", "qint32");
         typeMapping.put("long", "qint64");
         typeMapping.put("boolean", "bool");
+        typeMapping.put("number", "double");        
         typeMapping.put("array", "QList");
         typeMapping.put("map", "QMap");
         typeMapping.put("object", PREFIX + "Object");