diff --git a/raycastlib.h b/raycastlib.h
index f5092a4..b1a51eb 100644
--- a/raycastlib.h
+++ b/raycastlib.h
@@ -26,7 +26,7 @@
 
   author: Miloslav "drummyfish" Ciz
   license: CC0 1.0
-  version: 0.908d
+  version: 0.909d
 
   Version numbering: major.minor[d], id 'd' is appended, this is a
   in-development version based on the previous stable major.minor version. Two
@@ -1784,7 +1784,7 @@ RCL_Unit RCL_castRay3D(
   ray.direction.x = pos2.x - pos1.x;
   ray.direction.y = pos2.y - pos1.y;
 
-  distance = RCL_len(ray.direction);
+  distance = RCL_nonZero(RCL_len(ray.direction));
 
   ray.direction = RCL_normalize(ray.direction);