diff --git a/docs/user/support/Locker.dox b/docs/user/support/Locker.dox
index 14169ae0ee..41f7fd3063 100644
--- a/docs/user/support/Locker.dox
+++ b/docs/user/support/Locker.dox
@@ -46,7 +46,7 @@
   Flower::Grow(int length)
   {
     if (fLock->Lock()) {
-      fLength += lenght;
+      fLength += length;
       fLock->Unlock();
       return B_OK;
     } else {