diff --git a/default.txt b/default.txt
index 887c06b..900be7d 100644
--- a/default.txt
+++ b/default.txt
@@ -30,6 +30,7 @@
     direction: ltr;
     draggable: no;
     effects: no;
+    float: no;
     flow: yes;
     font: inherit;
     focusable: no;
diff --git a/properties.txt b/properties.txt
index 858a957..749c7a3 100644
--- a/properties.txt
+++ b/properties.txt
@@ -14,6 +14,7 @@
     direction: (ltr) | rtl | ttb | btt;
     draggable: yes | (no);
     effects: (no) | <object>;
+    float: yes | (no);
     flow: (yes) | no;
     font: <object>, …;
     focusable: yes | (no);