diff --git a/src/kits/support/Locker.cpp b/src/kits/support/Locker.cpp
index 63faadb5ad..8ba01b8d13 100644
--- a/src/kits/support/Locker.cpp
+++ b/src/kits/support/Locker.cpp
@@ -112,7 +112,7 @@ void
 BLocker::Unlock()
 {
 	// The Be Book explicitly allows any thread, not just the lock owner, to
-	// unlock. This is bad practise and Haiku should not allow it.
+	// unlock. This is bad practice and Haiku should not allow it.
 	if (!IsLocked())
 		debugger("Trying to unlock from the wrong thread (#6400)");