diff --git a/ironic_python_agent/shell/copy_configdrive_to_disk.sh b/ironic_python_agent/shell/copy_configdrive_to_disk.sh
index ecd408e6e..711fb63f1 100755
--- a/ironic_python_agent/shell/copy_configdrive_to_disk.sh
+++ b/ironic_python_agent/shell/copy_configdrive_to_disk.sh
@@ -104,7 +104,7 @@ else
 
     # Find partition we just created
     # Dump all partitions, ignore empty ones, then get the last partition ID
-    ISO_PARTITION=`sfdisk --dump $DEVICE | grep -v ' 0,' | tail -n1 | awk '{print $1}'` || fail "finding ISO partition created on ${DEVICE}"
+    ISO_PARTITION=`sfdisk --dump $DEVICE | grep -v ' 0,' | tail -n1 | awk -F ':' '{print $1}' | sed -e 's/\s*$//'` || fail "finding ISO partition created on ${DEVICE}"
 
     # Wait for udev to pick up the partition
     udevadm settle --exit-if-exists=$ISO_PARTITION