diff --git a/lib/Horde/Text/Diff/Engine/Native.php b/lib/Horde/Text/Diff/Engine/Native.php
index bcfb326..304bbf7 100644
--- a/lib/Horde/Text/Diff/Engine/Native.php
+++ b/lib/Horde/Text/Diff/Engine/Native.php
@@ -288,8 +288,6 @@ protected function _lcsPos($ypos)
             }
         }
 
-        assert($ypos != $this->seq[$end]);
-
         $this->in_seq[$this->seq[$end]] = false;
         $this->seq[$end] = $ypos;
         $this->in_seq[$ypos] = 1;
diff --git a/src/NativeEngine.php b/src/NativeEngine.php
index 4fa8241..f4b6af9 100644
--- a/src/NativeEngine.php
+++ b/src/NativeEngine.php
@@ -309,8 +309,6 @@ protected function _lcsPos($ypos)
             }
         }
 
-        assert($ypos != $this->seq[$end]);
-
         $this->in_seq[$this->seq[$end]] = false;
         $this->seq[$end] = $ypos;
         $this->in_seq[$ypos] = 1;