diff --git a/src/kits/interface/Box.cpp b/src/kits/interface/Box.cpp
index 9d2d51d1cf..63b04dc7dd 100644
--- a/src/kits/interface/Box.cpp
+++ b/src/kits/interface/Box.cpp
@@ -377,7 +377,7 @@ BBox::GetPreferredSize(float *_width, float *_height)
 	if (_width)
 		*_width = width;
 	if (_height)
-		*_height;
+		*_height = height;
 }