diff --git a/docs/manual/CoreTasks/property.html b/docs/manual/CoreTasks/property.html
index fcdb71c4c..7b1f6d5c7 100644
--- a/docs/manual/CoreTasks/property.html
+++ b/docs/manual/CoreTasks/property.html
@@ -13,7 +13,7 @@
 <p>Sets a property (by name and value), or set of properties (from file or
 resource) in the project.  Properties are case sensitive.</p>
  Properties are immutable: whoever sets a property first freezes it for the
- rest of the build; they are most definately not variable.
+ rest of the build; they are most definitely not variable.
 <p>There are six ways to set properties:</p>
 <ul>
   <li>By supplying both the <i>name</i> and <i>value</i> attribute.</li>