diff --git a/lib/dml/mssql_native_moodle_database.php b/lib/dml/mssql_native_moodle_database.php
index 46a4eecdbaa..42bd2c1a227 100644
--- a/lib/dml/mssql_native_moodle_database.php
+++ b/lib/dml/mssql_native_moodle_database.php
@@ -1098,7 +1098,9 @@ class mssql_native_moodle_database extends moodle_database {
      * @return string SQL fragment
      */
     public function sql_binary_equal($string1, $string2) {
-        return "$string1 COLLATE Latin1_General_CS_AS = $string2";
+        //TODO: we need to make sure this does not break unique indexes
+        //return "$string1 COLLATE Latin1_General_CS_AS = $string2";
+        return "$string1 = $string2";
     }
 
     /**
diff --git a/lib/dml/mysqli_native_moodle_database.php b/lib/dml/mysqli_native_moodle_database.php
index c07793ec826..fdd3918780e 100644
--- a/lib/dml/mysqli_native_moodle_database.php
+++ b/lib/dml/mysqli_native_moodle_database.php
@@ -1033,7 +1033,9 @@ class mysqli_native_moodle_database extends moodle_database {
      * @return string SQL fragment
      */
     public function sql_binary_equal($string1, $string2) {
-        return "BINARY $string1 = $string2";
+        //TODO: we need to make sure this does not break unique indexes
+        //return "BINARY $string1 = $string2";
+        return "$string1 = $string2";
     }
 
     /**
diff --git a/lib/dml/sqlsrv_native_moodle_database.php b/lib/dml/sqlsrv_native_moodle_database.php
index c73e585d9d0..a64770b2a18 100644
--- a/lib/dml/sqlsrv_native_moodle_database.php
+++ b/lib/dml/sqlsrv_native_moodle_database.php
@@ -1192,7 +1192,9 @@ class sqlsrv_native_moodle_database extends moodle_database {
      * @return string SQL fragment
      */
     public function sql_binary_equal($string1, $string2) {
-        return "$string1 COLLATE Latin1_General_CS_AS = $string2";
+        //TODO: we need to make sure this does not break unique indexes
+        //return "$string1 COLLATE Latin1_General_CS_AS = $string2";
+        return "$string1 = $string2";
     }
 
     /**