diff --git a/indra/llwindow/CMakeLists.txt b/indra/llwindow/CMakeLists.txt
index 7b1cab696f405644922cea4cc435ed96ee0c41fe..b4a3f744512d316bc4ed3177b31509b3328dc50c 100644
--- a/indra/llwindow/CMakeLists.txt
+++ b/indra/llwindow/CMakeLists.txt
@@ -102,11 +102,13 @@ if (WINDOWS)
        llwindowwin32.cpp
        lldxhardware.cpp
        llkeyboardwin32.cpp
+       lldragdropwin32.cpp
        )
   list(APPEND llwindow_HEADER_FILES
        llwindowwin32.h
        lldxhardware.h
        llkeyboardwin32.h
+       lldragdropwin32.h
        )
   list(APPEND llwindow_LINK_LIBRARIES
        comdlg32     # Common Dialogs for ChooseColor