diff --git a/src/in_line.scad b/src/in_line.scad
index 9c80ab66..ff6995d9 100644
--- a/src/in_line.scad
+++ b/src/in_line.scad
@@ -1,3 +1,10 @@
 include <__private__/__in_line.scad>;
 
-function in_line(line_pts, pt, epsilon = 0.0001) = __in_line(line_pts, pt, epsilon);
\ No newline at end of file
+function _in_line_sub(line_pts, pt, epsilon, iend, i = 0) = 
+    i == iend ? false : (
+        __in_line([line_pts[i], line_pts[i + 1]], pt, epsilon) ? true :
+            _in_line_sub(line_pts, pt, epsilon, iend, i + 1)
+    );
+
+function in_line(line_pts, pt, epsilon = 0.0001) = _in_line_sub(line_pts, pt, epsilon, len(line_pts) - 1);
+    
\ No newline at end of file