diff --git a/src/option.c b/src/option.c
index 9583aa3..657c011 100644
--- a/src/option.c
+++ b/src/option.c
@@ -6057,7 +6057,7 @@
     int
 valid_spellang(char_u *val)
 {
-    return valid_name(val, ".-_,");
+    return valid_name(val, ".-_,@");
 }
 
 /*