diff --git a/src/ring_extrude.scad b/src/ring_extrude.scad
index 47f9c741..39b79f70 100644
--- a/src/ring_extrude.scad
+++ b/src/ring_extrude.scad
@@ -17,14 +17,14 @@ module ring_extrude(shape_pts, radius, angle = 360, twist = 0, scale = 1.0, tria
     frags = __frags(radius);
     
     // 359.999988 is for avoiding "CGAL ERROR: assertion violation"
-    ang = angle == 360 ? 359.999988 : angle;
+    ang = (angle == 360 && twist % 360 != 0) ? 359.999988 : angle;
 
     angle_step = 360 / frags;
     as = [for(a = [0:angle_step:ang]) [90, 0, a]];
 
     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(
         cross_sections(shape_pts, pts, angles, twist, scale),
         triangles = triangles