diff --git a/lib/Diff/SequenceMatcher.php b/lib/Diff/SequenceMatcher.php
index e819e810..919860eb 100644
--- a/lib/Diff/SequenceMatcher.php
+++ b/lib/Diff/SequenceMatcher.php
@@ -631,7 +631,7 @@ private function quickRatio()
 	{
 		if($this->fullBCount === null) {
 			$this->fullBCount = array();
-			$bLength = count ($b);
+			$bLength = count ($this->b);
 			for($i = 0; $i < $bLength; ++$i) {
 				$char = $this->b[$i];
 				$this->fullBCount[$char] = $this->arrayGetDefault($this->fullBCount, $char, 0) + 1;
@@ -729,7 +729,7 @@ private function tupleSort($a, $b)
 			}
 		}
 
-		if(count($a) == $count($b)) {
+		if(count($a) == count($b)) {
 			return 0;
 		}
 		else if(count($a) < count($b)) {
@@ -739,4 +739,4 @@ private function tupleSort($a, $b)
 			return 1;
 		}
 	}
-}
\ No newline at end of file
+}