diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ScalatraServerCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ScalatraServerCodegen.java
index b22533ff2cc..cfb051ec83e 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ScalatraServerCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ScalatraServerCodegen.java
@@ -200,6 +200,6 @@ public class ScalatraServerCodegen extends AbstractScalaCodegen implements Codeg
     }
 
     private String sourceFolderByPackage(String packageName) {
-        return sourceFolder + File.separator + packageName.replaceAll("[.]", File.separator);
+        return sourceFolder + File.separator + packageName.replace('.', File.separatorChar);
     }
 }