diff --git a/modules/programs/zsh.nix b/modules/programs/zsh.nix
index 91ce16755..6253d2a77 100644
--- a/modules/programs/zsh.nix
+++ b/modules/programs/zsh.nix
@@ -53,13 +53,13 @@ let
       expireDuplicatesFirst = mkOption {
         type = types.bool;
         default = false;
-        description = "Expire duplicates first";
+        description = "Expire duplicates first.";
       };
 
       extended = mkOption {
         type = types.bool;
         default = false;
-        description = "Save timestamp into the history file";
+        description = "Save timestamp into the history file.";
       };
 
       share = mkOption {