diff --git a/src/DatabaseDriver.php b/src/DatabaseDriver.php
index 87a40e5b5..ba74966af 100644
--- a/src/DatabaseDriver.php
+++ b/src/DatabaseDriver.php
@@ -1588,7 +1588,7 @@ protected function quoteNameStr($strArr)
 			}
 			else
 			{
-				$parts[] = $q{0} . $part . $q{1};
+				$parts[] = $q[0] . $part . $q[1];
 			}
 		}
 
@@ -1666,7 +1666,7 @@ public function replacePrefix($sql, $prefix = '#__')
 
 				$l = $k - 1;
 
-				while ($l >= 0 && $sql{$l} === '\\')
+				while ($l >= 0 && $sql[$l] === '\\')
 				{
 					$l--;
 					$escaped = !$escaped;