diff --git a/Modules/Learning/Supervised/include/otbImageClassificationFilter.h b/Modules/Learning/Supervised/include/otbImageClassificationFilter.h
index 1f34888b054a1ee01e690bd8056a86b517ec1f80..0c7fc06d9eb346be2de50d73c8abb6b56b8b47e7 100644
--- a/Modules/Learning/Supervised/include/otbImageClassificationFilter.h
+++ b/Modules/Learning/Supervised/include/otbImageClassificationFilter.h
@@ -96,7 +96,7 @@ public:
   /**
    * Get the output confidence map
    */
-  const ConfidenceImageType * GetOutputConfidence(void);
+  ConfidenceImageType * GetOutputConfidence(void);
 
 protected:
   /** Constructor */