diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 3b838128..36d72444 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -62,12 +62,14 @@ set(DOCKS_INSTALLABLE_INCLUDES
 )
 
 set(DOCKS_INSTALLABLE_PRIVATE_INCLUDES
+    private/DragController_p.h
     private/Draggable_p.h
     private/DropIndicatorOverlayInterface_p.h
     private/FloatingWindow_p.h
     private/Frame_p.h
     private/SideBar_p.h
     private/TitleBar_p.h
+    private/WindowBeingDragged_p.h
 )
 
 set(DOCKS_INSTALLABLE_PRIVATE_WIDGET_INCLUDES
diff --git a/src/private/DragController_p.h b/src/private/DragController_p.h
index 16b95dff..0eb3d64c 100644
--- a/src/private/DragController_p.h
+++ b/src/private/DragController_p.h
@@ -12,6 +12,8 @@
 #ifndef KD_DRAGCONTROLLER_P_H
 #define KD_DRAGCONTROLLER_P_H
 
+#include "docks_export.h"
+
 #include "TitleBar_p.h"
 #include "WindowBeingDragged_p.h"
 
@@ -26,7 +28,7 @@ class DropArea;
 class Draggable;
 class FallbackMouseGrabber;
 
-class DragController : public QStateMachine
+class DOCKS_EXPORT DragController : public QStateMachine
 {
     Q_OBJECT
 public: