diff --git a/sql/patch_54_55_e.sql b/sql/patch_54_55_e.sql
index 4b89c77f744541c544f51a03a7c1803567d138b9..1f13f13396f2879d9a834f2a02a0e5a7e5a4b44f 100644
--- a/sql/patch_54_55_e.sql
+++ b/sql/patch_54_55_e.sql
@@ -7,7 +7,7 @@
 # for exons that are constitutive.  This is done by a script in
 # 'misc-scripts'.
 
-ALTER TABLE exon ADD COLUMN 'is_constitutive' BOOLEAN NOT NULL DEFAULT 0;
+ALTER TABLE exon ADD COLUMN is_constitutive BOOLEAN NOT NULL DEFAULT 0;
 
 # patch identifier
 INSERT INTO meta (species_id, meta_key, meta_value)