diff --git a/export_datapump.sh b/export_datapump.sh
index 3c5523f..ef9f051 100755
--- a/export_datapump.sh
+++ b/export_datapump.sh
@@ -45,6 +45,8 @@ exit $1
 #------------ MAIN ----------------------
 #----------------------------------------
 
+ORACLE_SID=$1
+
 [ "${ORACLE_SID}" ] || f_help 2;
 
 #------------------------------------------------------------------------------