diff --git a/db/versions/11230-brownEucalyptus/00-addClientObservationType.sql b/db/versions/11230-brownEucalyptus/00-addClientObservationType.sql
index 699d0bea4..cb0849888 100644
--- a/db/versions/11230-brownEucalyptus/00-addClientObservationType.sql
+++ b/db/versions/11230-brownEucalyptus/00-addClientObservationType.sql
@@ -1,3 +1,3 @@
 ALTER TABLE vn.clientObservation 
-	ADD COLUMN observationTypeFk TINYINT(3) UNSIGNED,
+	ADD COLUMN observationTypeFk TINYINT(3) UNSIGNED NOT NULL,
 	ADD CONSTRAINT clientObservationTypeFk FOREIGN KEY (observationTypeFk) REFERENCES vn.observationType(id);
\ No newline at end of file