diff --git a/src/MNH/diag.f90 b/src/MNH/diag.f90
index d161d13b027d1164ddebdb9f14e3281b7e15a3e2..82bd467578c6d746c07bab7c9685efeeb49408a9 100644
--- a/src/MNH/diag.f90
+++ b/src/MNH/diag.f90
@@ -253,6 +253,7 @@ CPROGRAM='DIAG  '
 !
 CALL IO_Init()
 CALL SECOND_MNH2(ZTIME1)
+CALL NSV_ASSOCIATE()
 ZTIME0=ZTIME1
 !
 ! initialization of logical for the diagnostics