diff --git a/dictsource/ar_rules b/dictsource/ar_rules
index 826f0d6c..a7524353 100644
--- a/dictsource/ar_rules
+++ b/dictsource/ar_rules
@@ -359,6 +359,7 @@
           ٍ  // kasratan
          ـ  // tatweel
           ۡ  // small high dotless head of khan
+          ْ  // sukun
 
 // non-ascii characters with specified pronunciations
 // List the accented characters in en_list with the $accent attribute