diff --git a/src/MNH/mode_les_diachro.f90 b/src/MNH/mode_les_diachro.f90
index ba8129e71e08250d057c7b5fa3b7956fc726ceec..3ca1897c8164f7bc0d1e9b466452e57f217afd23 100644
--- a/src/MNH/mode_les_diachro.f90
+++ b/src/MNH/mode_les_diachro.f90
@@ -1018,7 +1018,7 @@ iresp = 0
 if ( oavg ) call Les_time_avg_4d( zfield, tzdates, iresp )
 
 if ( Present( hsuffixes ) ) then
-  ytitle(:) = tpfield%cmnhname // hsuffixes(:)
+  ytitle(:) = Trim( tpfield%cmnhname ) // hsuffixes(:)
 else
   ytitle(:) = tpfield%cmnhname
 endif