diff --git a/Line.h b/Line.h
index 8ff77cb..6f74096 100644
--- a/Line.h
+++ b/Line.h
@@ -58,7 +58,7 @@ public:
         float b = to().x() - from().x();
         float c = from().x() * to().y() - to().x() * from().y();
         
-        float d = abs(a * other.x() + b * other.y() + c);
+        float d = a * other.x() + b * other.y() + c;
 
         return (d * d) / (a * a + b * b);
     }