diff --git a/src/ring_extrude.scad b/src/ring_extrude.scad
index 8d77bc10..eeed7a1b 100644
--- a/src/ring_extrude.scad
+++ b/src/ring_extrude.scad
@@ -15,11 +15,14 @@ include <__private__/__frags.scad>;
 
 module ring_extrude(shape_pts, radius, angle = 360, twist = 0, scale = 1.0, triangles = "SOLID") {
     frags = __frags(radius);
+    
+    // 359.9999 is for avoiding "CGAL ERROR: assertion violation"
+    ang = angle == 360 ? 359.9999 : angle;
 
     angle_step = 360 / frags;
-    as = [for(a = [0:angle_step:angle]) [90, 0, a]];
+    as = [for(a = [0:angle_step:ang]) [90, 0, a]];
 
-    angles = as[len(as) - 1][2] == angle ? as : concat(as, [[90, 0, angle]]);
+    angles = as[len(as) - 1][2] == ang ? as : concat(as, [[90, 0, ang]]);
     pts = [for(a = angles) [radius * cos(a[2]), radius * sin(a[2])]];
 
     polysections(