Index: branches/5.2.x/core/units/filters/item_filter_tp.php
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diff -u -N -r14893 -r14899
--- branches/5.2.x/core/units/filters/item_filter_tp.php	(.../item_filter_tp.php)	(revision 14893)
+++ branches/5.2.x/core/units/filters/item_filter_tp.php	(.../item_filter_tp.php)	(revision 14899)
@@ -81,7 +81,7 @@
 				// 2. count of items from last range is displayed below filter scale
 				// 3. filter scale has fixed image background that allows only 10 positions
 
-				$range_sql = str_replace('COUNT(*) AS count', 'MIN(' . $field_sql . ') AS MinValue, MAX(' . $field_sql . ') AS MaxValue', $sql);
+				$range_sql = str_replace('COUNT(*) AS count', 'MIN(' . $field_sql . ') AS `MinValue`, MAX(' . $field_sql . ') AS `MaxValue`', $sql);
 				$range_values = $this->Conn->GetRow($range_sql);
 
 				if ( !$range_values['MinValue'] && !$range_values['MaxValue'] ) {