diff --git a/udev/udev.xml b/udev/udev.xml
index 48980577c08..57f13e07b01 100644
--- a/udev/udev.xml
+++ b/udev/udev.xml
@@ -528,10 +528,10 @@
 
       <para>The <option>NAME</option>, <option>SYMLINK</option>, <option>PROGRAM</option>,
       <option>OWNER</option>, <option>GROUP</option>, <option>MODE</option>  and  <option>RUN</option>
-      fields support simple printf-like string substitutions. The <option>RUN</option>
-      format chars gets applied after all rules have been processed, right before the program
-      is executed. It allows the use of device properties set by earlier matching
-      rules. For all other fields, substitutions are applied while the individual rule is
+      fields support simple string substitutions. The <option>RUN</option>
+      substitutions are performed after all rules have been processed, right before the program
+      is executed, allowing for the use of device properties set by earlier matching
+      rules. For all other fields, substitutions are performed while the individual rule is
       being processed. The available substitutions are:</para>
       <variablelist>
         <varlistentry>