diff --git a/src/octoprint/plugins/virtual_printer/virtual.py b/src/octoprint/plugins/virtual_printer/virtual.py
index 9bde9949..2ae3ba86 100644
--- a/src/octoprint/plugins/virtual_printer/virtual.py
+++ b/src/octoprint/plugins/virtual_printer/virtual.py
@@ -62,10 +62,10 @@ class VirtualPrinter(object):
 		self.speeds = settings().get(["devel", "virtualPrinter", "movementSpeed"])
 
 		self._relative = True
-		self._lastX = None
-		self._lastY = None
-		self._lastZ = None
-		self._lastE = None
+		self._lastX = 0.0
+		self._lastY = 0.0
+		self._lastZ = 0.0
+		self._lastE = 0.0
 
 		self._unitModifier = 1