diff --git a/src/MNH/ini_balloon.f90 b/src/MNH/ini_balloon.f90
index 886f3f83e61f10dfa0d8caf1dee4c930e66f6191..f52a2f994e9e2e3e4da87ee341ec777a7bbdfb59 100644
--- a/src/MNH/ini_balloon.f90
+++ b/src/MNH/ini_balloon.f90
@@ -344,7 +344,7 @@ DO JI = 1, NBALLOONS
   END SELECT
 END DO
 
-CALL BALLOONS_NML_DEALLOCATE()
+IF ( NBALLOONS > 0 ) CALL BALLOONS_NML_DEALLOCATE()
 
 !----------------------------------------------------------------------------
 !