diff --git a/modules/xresources.nix b/modules/xresources.nix
index cb8dae238..a2396e236 100644
--- a/modules/xresources.nix
+++ b/modules/xresources.nix
@@ -32,7 +32,7 @@ in {
     xresources.properties = mkOption {
       type = with types;
         let
-          prim = either bool (either int str);
+          prim = oneOf [ bool int float str ];
           entry = either prim (listOf prim);
         in nullOr (attrsOf entry);
       default = null;
diff --git a/tests/modules/xresources/xresources-expected.conf b/tests/modules/xresources/xresources-expected.conf
index 20b47e508..577605d2a 100644
--- a/tests/modules/xresources/xresources-expected.conf
+++ b/tests/modules/xresources/xresources-expected.conf
@@ -1,5 +1,6 @@
 Test*boolean1: true
 Test*boolean2: false
+Test*float: 12.300000
 Test*int: 10
 Test*list: list-str, true, false, 10
 Test*string: test-string
diff --git a/tests/modules/xresources/xresources.nix b/tests/modules/xresources/xresources.nix
index 36d092e0d..3f8a83678 100644
--- a/tests/modules/xresources/xresources.nix
+++ b/tests/modules/xresources/xresources.nix
@@ -7,6 +7,7 @@
       "Test*boolean1" = true;
       "Test*boolean2" = false;
       "Test*int" = 10;
+      "Test*float" = 12.3;
       "Test*list" = [ "list-str" true false 10 ];
     };
   };