diff --git a/src/db/migration/V20180529_1110__mantis11237.sql b/src/db/migration/V20180529_1110__mantis11237.sql
new file mode 100644
index 000000000..d799b0457
--- /dev/null
+++ b/src/db/migration/V20180529_1110__mantis11237.sql
@@ -0,0 +1,7 @@
+declare
+    column_exists exception;
+    pragma exception_init (column_exists , -01430);
+begin
+    execute immediate 'ALTER TABLE SEGPOLV MODIFY (POLTRONA VARCHAR2(3))';
+    exception when column_exists then null;
+end;
\ No newline at end of file