diff --git a/src/ring_extrude.scad b/src/ring_extrude.scad
index 400154fd..4d188ddf 100644
--- a/src/ring_extrude.scad
+++ b/src/ring_extrude.scad
@@ -33,12 +33,12 @@ module ring_extrude(shape_pts, radius, angle = 360, twist = 0, scale = 1.0, tria
 
         angs = [
             [90, 0, angles[0]], 
-            if(m <= n) each [for(i = [m:n]) [90, 0, a_step * i]]
+            each [for(i = m; i <= n; i = i + 1) [90, 0, a_step * i]]
         ];
 
         pts = [
             __ra_to_xy(begin_r, angles[0]), 
-            if(m <= n) each [for(i = [m:n]) __ra_to_xy(radius, a_step * i)]
+            each [for(i = m; i <= n; i = i + 1) __ra_to_xy(radius, a_step * i)]
         ];
 
         is_angle_frag_end = angs[len(angs) - 1][2] == angles[1];
diff --git a/src/shape_arc.scad b/src/shape_arc.scad
index 73b659f6..d316e99c 100644
--- a/src/shape_arc.scad
+++ b/src/shape_arc.scad
@@ -28,14 +28,14 @@ function shape_arc(radius, angle, width, width_mode = "LINE_CROSS") =
         points = [
             // outer arc path
             __ra_to_xy(__edge_r_begin(r_outer, a0, a_step, m), a0),
-            if(m <= n) each [for(i = m; i <= n; i = i + 1)  __ra_to_xy(r_outer, a_step * i)],
+            each [for(i = m; i <= n; i = i + 1)  __ra_to_xy(r_outer, a_step * i)],
             if(a1 != a_step * n) each [
                 __ra_to_xy(__edge_r_end(r_outer, a1, a_step, n), a1),
             // inner arc path
                 __ra_to_xy(__edge_r_end(r_inner, a1, a_step, n), a1)
             ],
             // inner arc path
-            if(m <= n) each [
+            each [
                 for(i = m; i <= n; i = i + 1)
                 __ra_to_xy(r_inner, a_step * (n + m - i))