diff --git a/scour.py b/scour.py
index c33017d..f484bf6 100755
--- a/scour.py
+++ b/scour.py
@@ -64,7 +64,6 @@ import math
 import base64
 import os.path
 import urllib
-import svg_regex
 from svg_regex import svg_parser
 
 APP = 'scour'
@@ -630,7 +629,8 @@ def serializePath(pathObj):
 						# if coord can be an integer without loss of precision, go for it
 						if int(coord) == coord: pathStr += str(int(coord))
 						else: pathStr += str(coord)
-						if c < len(data)-1:
+						# only need the comma if the next number if non-negative
+						if c < len(data)-1 and data[c+1] >= 0:
 							pathStr += ','
 						c += 1
 				except TypeError:
diff --git a/testscour.py b/testscour.py
index 0d3e1ed..fb5b335 100755
--- a/testscour.py
+++ b/testscour.py
@@ -20,6 +20,7 @@
 import unittest
 import scour
 import xml.dom.minidom
+from svg_regex import svg_parser
 
 SVGNS = 'http://www.w3.org/2000/svg'
 
@@ -421,6 +422,19 @@ class DoNotCollapseMultiplyReferencedGradients(unittest.TestCase):
 		self.assertNotEquals(len(doc.getElementsByTagNameNS(SVGNS, 'linearGradient')), 0,
 			'Multiply-referenced linear gradient collapsed' )
 
+class RemoveTrailingZeroesFromPath(unittest.TestCase):
+	def runTest(self):
+		doc = scour.scourXmlFile('unittests/path-truncate-zeroes.svg')
+		path = doc.getElementsByTagNameNS(SVGNS, 'path')[0].getAttribute('d')
+		self.assertEquals(path[:4] == 'M300' and path[4] != '.', True,
+			'Trailing zeros not removed from path data' )
+
+class RemoveDelimiterBeforeNegativeCoordsInPath(unittest.TestCase):
+	def runTest(self):
+		doc = scour.scourXmlFile('unittests/path-truncate-zeroes.svg')
+		path = doc.getElementsByTagNameNS(SVGNS, 'path')[0].getAttribute('d')
+		self.assertEquals(path[4], '-', 
+			'Delimiters not removed before negative coordinate in path data' )
 
 #class RemoveUnreferencedFonts(unittest.TestCase):
 #	def runTest(self):
diff --git a/unittests/path-truncate-zeroes.svg b/unittests/path-truncate-zeroes.svg
new file mode 100644
index 0000000..4de6d52
--- /dev/null
+++ b/unittests/path-truncate-zeroes.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
+  <path d="M300.0000, -100.1 z" fill="red" />
+</svg>