diff --git a/Modules/Applications/AppDimensionalityReduction/app/otbDimensionalityReduction.cxx b/Modules/Applications/AppDimensionalityReduction/app/otbDimensionalityReduction.cxx
index dd9c450359f24d17d5389bc2172f728ae25d0bc8..b3b15d108f351e616c8bee9a9dd370ffa1814995 100644
--- a/Modules/Applications/AppDimensionalityReduction/app/otbDimensionalityReduction.cxx
+++ b/Modules/Applications/AppDimensionalityReduction/app/otbDimensionalityReduction.cxx
@@ -168,6 +168,8 @@ private:
     AddParameter(ParameterType_OutputFilename, "outmatrix", "Transformation matrix output (text format)");
     SetParameterDescription("outmatrix", "Filename to store the transformation matrix (csv format)");
     MandatoryOff("outmatrix");
+    DisableParameter("outmatrix");
+    
 
     AddRAMParameter();