diff --git a/sql/import.sql b/sql/import.sql
index b5a8cb4..7aea248 100644
--- a/sql/import.sql
+++ b/sql/import.sql
@@ -169,7 +169,8 @@ UPDATE import.personnes SET maritalstatus1=json_build_object('fr', trim(maritals
 
 -- 25. Prepare personnes numberofchildren
 ALTER TABLE import.personnes ADD COLUMN numberofchildren1 integer;
-UPDATE import.personnes SET numberofchildren1=to_number(trim(numberofchildren::text) ) WHERE numberofchildren!=''; -- <== case BOUM
+UPDATE import.personnes SET numberofchildren1=NULLIF(numberofchildren, '')::int;
+-- SELECT numberofchildren, numberofchildren1 FROM import.personnes;
 
 
 -- 26. Prepare personnes household_composition_type