diff --git a/modules/misc/xdg-desktop-entries.nix b/modules/misc/xdg-desktop-entries.nix
index c538eda33..a54f6a8d6 100644
--- a/modules/misc/xdg-desktop-entries.nix
+++ b/modules/misc/xdg-desktop-entries.nix
@@ -107,7 +107,7 @@ let
       };
 
       settings = mkOption {
-        type = types.attrsOf types.string;
+        type = types.attrsOf types.str;
         description = ''
           Extra key-value pairs to add to the <literal>[Desktop Entry]</literal> section.
           This may override other values.
diff --git a/modules/programs/tmate.nix b/modules/programs/tmate.nix
index 6681baf6c..df1af45e0 100644
--- a/modules/programs/tmate.nix
+++ b/modules/programs/tmate.nix
@@ -36,7 +36,7 @@ in {
       };
 
       dsaFingerprint = mkOption {
-        type = with types; nullOr string;
+        type = with types; nullOr str;
         default = null;
         example = literalExpression
           "SHA256:1111111111111111111111111111111111111111111";
@@ -44,7 +44,7 @@ in {
       };
 
       rsaFingerprint = mkOption {
-        type = with types; nullOr string;
+        type = with types; nullOr str;
         default = null;
         example = literalExpression
           "SHA256:1111111111111111111111111111111111111111111";