diff --git a/dialects/postgres.go b/dialects/postgres.go
index 80e2f0ad..89bd4672 100644
--- a/dialects/postgres.go
+++ b/dialects/postgres.go
@@ -1050,7 +1050,7 @@ WHERE c.relkind = 'r'::char AND c.relname = $1%s AND f.attnum > 0 ORDER BY f.att
 			}
 		}
 		if _, ok := schemas.SqlTypes[col.SQLType.Name]; !ok {
-			return nil, nil, fmt.Errorf("Unknown colType: %v", dataType)
+			return nil, nil, fmt.Errorf("Unknown colType: %s - %s", dataType, col.SQLType.Name)
 		}
 
 		col.Length = maxLen