diff --git a/src/MNH/mode_datetime.f90 b/src/MNH/mode_datetime.f90
index 07e9c816bc53a916790c2a5ea49bd4123bc658c8..5c73ea3ca2459d43cb0ebe6bd45d75741da8309c 100644
--- a/src/MNH/mode_datetime.f90
+++ b/src/MNH/mode_datetime.f90
@@ -20,6 +20,7 @@ IMPLICIT NONE
 PRIVATE
 !
 PUBLIC :: DATETIME_DISTANCE, DATETIME_CORRECTDATE
+PUBLIC :: TPREFERENCE_DATE
 PUBLIC :: OPERATOR(<)
 PUBLIC :: OPERATOR(<=)
 PUBLIC :: OPERATOR(>)