diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppPistacheServerCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppPistacheServerCodegen.java
index 70ba645a4e6..01de20d8c83 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppPistacheServerCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppPistacheServerCodegen.java
@@ -246,11 +246,13 @@ public class CppPistacheServerCodegen extends AbstractCppCodegen {
             }
             op.vendorExtensions.put("x-codegen-pistache-consumesJson", consumeJson);
             op.vendorExtensions.put("x-codegen-pistache-isParsingSupported", isParsingSupported);
+            
+            // Check if any one of the operations needs a model, then at API file level, at least one model has to be included.
             for(String hdr : op.imports) {
                 if(importMapping.containsKey(hdr)) {
                     continue;
                 }
-                additionalProperties.put("hasModelImport", true);
+                operations.put("hasModelImport", true);
             }
         }