diff --git a/src/viewer.js b/src/viewer.js
index a138e2de..985ba468 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -2810,18 +2810,18 @@ function onCanvasKeyPress( event ) {
                 break;
             case 114: //r - clockwise rotation
               if(this.viewport.flipped){
-                this.viewport.setRotation($.positiveModulo(this.viewport.getRotation() - this.rotationIncrement, 360));
+                this.viewport.setRotation(this.viewport.getRotation() - this.rotationIncrement);
               } else{
-                this.viewport.setRotation($.positiveModulo(this.viewport.getRotation() + this.rotationIncrement, 360));
+                this.viewport.setRotation(this.viewport.getRotation() + this.rotationIncrement);
               }
               this.viewport.applyConstraints();
               event.preventDefault = true;
               break;
             case 82: //R - counterclockwise  rotation
               if(this.viewport.flipped){
-                this.viewport.setRotation($.positiveModulo(this.viewport.getRotation() + this.rotationIncrement, 360));
+                this.viewport.setRotation(this.viewport.getRotation() + this.rotationIncrement);
               } else{
-                this.viewport.setRotation($.positiveModulo(this.viewport.getRotation() - this.rotationIncrement, 360));
+                this.viewport.setRotation(this.viewport.getRotation() - this.rotationIncrement);
               }
               this.viewport.applyConstraints();
               event.preventDefault = true;
@@ -3708,9 +3708,9 @@ function onRotateLeft() {
         var currRotation = this.viewport.getRotation();
 
         if ( this.viewport.flipped ){
-          currRotation = $.positiveModulo(currRotation + this.rotationIncrement, 360);
+          currRotation += this.rotationIncrement;
         } else {
-          currRotation = $.positiveModulo(currRotation - this.rotationIncrement, 360);
+          currRotation -= this.rotationIncrement;
         }
         this.viewport.setRotation(currRotation);
     }
@@ -3721,9 +3721,9 @@ function onRotateRight() {
         var currRotation = this.viewport.getRotation();
 
         if ( this.viewport.flipped ){
-          currRotation = $.positiveModulo(currRotation - this.rotationIncrement, 360);
+          currRotation -= this.rotationIncrement;
         } else {
-          currRotation = $.positiveModulo(currRotation + this.rotationIncrement, 360);
+          currRotation += this.rotationIncrement;
         }
         this.viewport.setRotation(currRotation);
     }
diff --git a/src/viewport.js b/src/viewport.js
index 118f8184..d37bfbae 100644
--- a/src/viewport.js
+++ b/src/viewport.js
@@ -138,6 +138,7 @@ $.Viewport = function( options ) {
         springStiffness: this.springStiffness,
         animationTime: this.animationTime
     });
+    delete options.degrees;
 
     this._oldCenterX = this.centerSpringX.current.value;
     this._oldCenterY = this.centerSpringY.current.value;
@@ -904,8 +905,6 @@ $.Viewport.prototype = {
             this.degreesSpring.springTo(degrees);
         }
 
-        this.degrees = $.positiveModulo(this.degreesSpring.target.value, 360);
-
         this._setContentBounds(
             this.viewer.world.getHomeBounds(),
             this.viewer.world.getContentFactor());