diff --git a/atom b/atom
index aa3e841..997916e 100755
--- a/atom
+++ b/atom
@@ -400,7 +400,7 @@ Update(){
 			value)
 				case $argument in
 					'NULL')
-						set_statement+=" is NULL"
+						set_statement+=" = NULL"
 					;;
 					+([0-9])?(.+([0-9])))
 						set_statement+=" = $argument"