diff --git a/src/add/array.js b/src/add/array.js
index c0f4f775..7d645a38 100644
--- a/src/add/array.js
+++ b/src/add/array.js
@@ -253,6 +253,7 @@ Math.bound = function(val, min, max) {
 };
 
 Number.prototype.round = function(digits) {
+    if (digits === 0) return this.valueOf() | 0;
     const pow = Math.pow(10, digits || 3);
     return Math.round(this.valueOf() * pow) / pow;
 };
diff --git a/src/geo/base.js b/src/geo/base.js
index dcace90e..4ce26fa8 100644
--- a/src/geo/base.js
+++ b/src/geo/base.js
@@ -134,7 +134,9 @@ function inRange(value, min, max) {
 }
 
 function round(v, zeros) {
-    let pow = Math.pow(10, zeros || round_decimal_precision);
+    const prec = zeros !== undefined ? zeros : round_decimal_precision;
+    if (prec === 0) return v | 0;
+    let pow = Math.pow(10, prec);
     return Math.round(v * pow) / pow;
 }
 
diff --git a/src/kiri-mode/cam/export.js b/src/kiri-mode/cam/export.js
index 98a33e57..ac6c29b6 100644
--- a/src/kiri-mode/cam/export.js
+++ b/src/kiri-mode/cam/export.js
@@ -131,7 +131,7 @@ CAM.export = function(print, online) {
     function add0(val, opt) {
         let s = val.toString(),
             d = s.indexOf(".");
-        if (d < 0) {
+        if (d < 0 && decimals > 0) {
             return opt ? s : s + '.0';
         } else {
             return val.toFixed(decimals);
@@ -170,7 +170,6 @@ CAM.export = function(print, online) {
         newpos.x = util.round(newpos.x, decimals);
         newpos.y = util.round(newpos.y, decimals);
         newpos.z = util.round(newpos.z, decimals);
-        // newpos.a = util.round(newpos.a || 0, decimals);
 
         // on tool change
         let changeTool = out.tool != pos.t;
@@ -333,7 +332,7 @@ CAM.export = function(print, online) {
                 if (map.Y) scale.y = map.Y;
                 if (map.Z) scale.z = map.Z;
                 if (map.DEC !== undefined) decimals = parseInt(map.DEC);
-                console.log('scaling axes', scale);
+                console.log('export scaling applied', map);
             } catch (e) {
                 console.log('malformed scale directive', line);
             }