diff --git a/src/arc.scad b/src/arc.scad
index 51efb872..d845bbf3 100644
--- a/src/arc.scad
+++ b/src/arc.scad
@@ -12,6 +12,8 @@
 *
 **/ 
 
+include <__private__/__frags.scad>;
+
 module arc(radius, angles, width, width_mode = "LINE_CROSS") {
 
     w_offset = width_mode == "LINE_CROSS" ? [width / 2, -width / 2] : (