diff --git a/diskimage_builder/block_device/level1/partitioning.py b/diskimage_builder/block_device/level1/partitioning.py
index 86924647..6d1293af 100644
--- a/diskimage_builder/block_device/level1/partitioning.py
+++ b/diskimage_builder/block_device/level1/partitioning.py
@@ -136,7 +136,7 @@ class Partitioning(PluginBase):
         for p in self.partitions:
             args = {}
             args['pnum'] = pnum
-            args['name'] = '"%s"' % p.get_name()
+            args['name'] = '%s' % p.get_name()
             args['type'] = '%s' % p.get_type()
 
             # convert from a relative/string size to bytes
@@ -149,9 +149,11 @@ class Partitioning(PluginBase):
             assert size <= disk_free
             args['size'] = size // (1024 * 1024)
 
-            new_cmd = ("-n {pnum}:0:+{size}M -t {pnum}:{type} "
-                       "-c {pnum}:{name}".format(**args))
-            cmd.extend(new_cmd.strip().split(' '))
+            new_cmd = ("-n", "{pnum}:0:+{size}M".format(**args),
+                       "-t", "{pnum}:{type}".format(**args),
+                       # Careful with this one, as {name} could have spaces
+                       "-c", "{pnum}:{name}".format(**args))
+            cmd.extend(new_cmd)
 
             # Fill the state; we mount all partitions with kpartx
             # below once we're done.  So the device this partition
diff --git a/diskimage_builder/block_device/tests/config/gpt_efi.yaml b/diskimage_builder/block_device/tests/config/gpt_efi.yaml
index 9ef2f682..c5fd8aee 100644
--- a/diskimage_builder/block_device/tests/config/gpt_efi.yaml
+++ b/diskimage_builder/block_device/tests/config/gpt_efi.yaml
@@ -20,7 +20,9 @@
       - name: BSP
         type: 'EF02'
         size: 8MiB
-      - name: root
+        # spaces are probably a bad idea for max compatability, but
+        # we're deliberatly testing it here.
+      - name: Root Part
         type: '8300'
         size: 100%
         mkfs:
diff --git a/diskimage_builder/block_device/tests/test_gpt.py b/diskimage_builder/block_device/tests/test_gpt.py
index bc200980..db046282 100644
--- a/diskimage_builder/block_device/tests/test_gpt.py
+++ b/diskimage_builder/block_device/tests/test_gpt.py
@@ -63,13 +63,12 @@ class TestGPT(tc.TestGraphGeneration):
                 node.create()
 
         # check the parted call looks right
-        parted_cmd = ('sgdisk %s '
-                      '-n 1:0:+8M -t 1:EF00 -c 1:"ESP" '
-                      '-n 2:0:+8M -t 2:EF02 -c 2:"BSP" '
-                      '-n 3:0:+1006M -t 3:8300 -c 3:"root"'
-                      % self.image_path)
+        parted_cmd = ['sgdisk', self.image_path,
+                      '-n', '1:0:+8M', '-t', '1:EF00', '-c', '1:ESP',
+                      '-n', '2:0:+8M', '-t', '2:EF02', '-c', '2:BSP',
+                      '-n', '3:0:+1006M', '-t', '3:8300', '-c', '3:Root Part']
         cmd_sequence = [
-            mock.call(parted_cmd.split(' ')),
+            mock.call(parted_cmd),
             mock.call(['sync']),
             mock.call(['kpartx', '-avs', '/dev/loopX'])
         ]
@@ -81,5 +80,5 @@ class TestGPT(tc.TestGraphGeneration):
                              {'device': '/dev/mapper/loopXp1'})
         self.assertDictEqual(state['blockdev']['BSP'],
                              {'device': '/dev/mapper/loopXp2'})
-        self.assertDictEqual(state['blockdev']['root'],
+        self.assertDictEqual(state['blockdev']['Root Part'],
                              {'device': '/dev/mapper/loopXp3'})