diff --git a/src/sources/mysql/mysql.lisp b/src/sources/mysql/mysql.lisp
index 72a8cf1..34e5caf 100644
--- a/src/sources/mysql/mysql.lisp
+++ b/src/sources/mysql/mysql.lisp
@@ -54,7 +54,9 @@
         ;; the table has a primary key over a integer data type we are able
         ;; to generate WHERE clause and range index scans.
         (with-connection (*connection* (source-db mysql))
-          (let* ((col pcol)
+          (let* ((col (mysql-column-name
+                       (nth (position coldef (table-column-list (target mysql)))
+                            (fields mysql))))
                  (sql (format nil "select min(`~a`), max(`~a`) from `~a`"
                               col col (table-source-name (source mysql)))))
             (destructuring-bind (min max)
diff --git a/test/mysql/my.load b/test/mysql/my.load
index fc82232..1bc17d9 100644
--- a/test/mysql/my.load
+++ b/test/mysql/my.load
@@ -5,7 +5,8 @@ load database
 
  WITH concurrency = 2,
       multiple readers per thread,
-      rows per range = 50000
+      rows per range = 50000,
+      quote identifiers
 
  ALTER SCHEMA 'pgloader' RENAME TO 'mysql'
 
diff --git a/test/mysql/my.sql b/test/mysql/my.sql
index 44234f1..17cd3b6 100644
--- a/test/mysql/my.sql
+++ b/test/mysql/my.sql
@@ -100,6 +100,13 @@ create table bits
 
 insert into bits(bool) values(0b00), (0b01);
 
+/*
+ * https://github.com/dimitri/pgloader/issues/703
+ */
+create table `CamelCase` (
+ `validSizes` varchar(12)
+);
+
 CREATE TABLE `fcm_batches` (
   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
   `raw_payload` mediumtext COLLATE utf8_unicode_ci,