diff --git a/src/kits/app/Message.cpp b/src/kits/app/Message.cpp
index 5b802d1f44..d0a36227e5 100644
--- a/src/kits/app/Message.cpp
+++ b/src/kits/app/Message.cpp
@@ -2648,6 +2648,7 @@ BMessage::Set##typeName(const char* name, const type& value)				\
 DEFINE_SET_GET_BY_REFERENCE_FUNCTIONS(BPoint, Point, B_POINT_TYPE);
 DEFINE_SET_GET_BY_REFERENCE_FUNCTIONS(BRect, Rect, B_RECT_TYPE);
 DEFINE_SET_GET_BY_REFERENCE_FUNCTIONS(BSize, Size, B_SIZE_TYPE);
+DEFINE_SET_GET_BY_REFERENCE_FUNCTIONS(BAlignment, Alignment, B_ALIGNMENT_TYPE);
 
 #undef DEFINE_SET_GET_BY_REFERENCE_FUNCTIONS