diff --git a/dotstow.sh b/dotstow.sh
index c619f95..435ff41 100755
--- a/dotstow.sh
+++ b/dotstow.sh
@@ -1,5 +1,21 @@
 #!/bin/bash
 
+if [ -z "$(which realpath)" ]; then
+    realpath() {
+        path=$1
+        if [ "${path[0]}" == "/" ]; then
+            echo $path;
+        elif [ "${path[0]}" == "~" ]; then
+            echo $HOME/${path:2}
+        elif [ "${path:0:2}" == ".." ]; then
+            echo $(dirname $(pwd))/${path:3}
+        else
+            echo $(pwd)/$path
+        fi
+    }
+fi
+
+
 stow() {
     local stowrepo=$1
     local stowtarget=$2