diff --git a/README.md b/README.md
index ffc378f..6008ba5 100644
--- a/README.md
+++ b/README.md
@@ -14,4 +14,7 @@
     cd edu-image
     ./resize.sh
     ```
-1. A backup of the image will be created in ~/backups that can be used to create new cards if needed.
+1. A backup of the image will be created in ~/backups that can be used to create new cards if needed. If you're running this script on a Pi or a Desktop running Raspbian, then you'll need to install pv first: 
+	``` bash
+	sudo apt-get install pv
+	```
diff --git a/resize.sh b/resize.sh
index 5903c6f..2b40ae7 100755
--- a/resize.sh
+++ b/resize.sh
@@ -32,8 +32,16 @@ echo "The following filesystems have been found:"
 lsblk
 read -e -p "Which blockdevice: " -i "mmcblk0" myblkdev
 read -e -p "Which partition do you want to shrink: " -i "2" targetpartnr
-targetpart="${myblkdev}p${targetpartnr}"
-
+if [ -e /etc/os-release ]
+then
+	echo 'os-release found'
+	if grep -q Raspbian /etc/os-release; then
+		echo 'Looks like this is Raspbian'
+		targetpart="${myblkdev}${targetpartnr}"
+	else
+		targetpart="${myblkdev}p${targetpartnr}"
+	fi
+fi
 # Unmount directories, otherwise online shrinking from resize2fs would be
 # required but this throws an error.
 if grep -s "${myblkdev}" /proc/mounts