diff --git a/src/MNH/modn_output.f90 b/src/MNH/modn_output.f90
index 01e1f49ec8666f9edabb1309af40b1c7c368b346..56db2dbe85424307d64c26d71f8b96fef279bcef 100644
--- a/src/MNH/modn_output.f90
+++ b/src/MNH/modn_output.f90
@@ -125,6 +125,8 @@ SUBROUTINE OUTPUT_NML_DEALLOCATE( )
 
   DEALLOCATE( COUT_BOX_NAME )
 
+  DEALLOCATE( COUT_BOX_VAR_SUPP )
+
   DEALLOCATE( NOUT_BOX_IINF )
   DEALLOCATE( NOUT_BOX_ISUP )
   DEALLOCATE( NOUT_BOX_JINF )