diff --git a/include/libweston/libweston.h b/include/libweston/libweston.h
index 41db3037..6321d8da 100644
--- a/include/libweston/libweston.h
+++ b/include/libweston/libweston.h
@@ -2225,10 +2225,6 @@ weston_log_ctx_compositor_destroy(struct weston_compositor *compositor);
 int
 weston_compositor_enable_content_protection(struct weston_compositor *compositor);
 
-void
-weston_protected_surface_send_event(struct protected_surface *psurface,
-				    enum weston_hdcp_protection protection);
-
 #ifdef  __cplusplus
 }
 #endif
diff --git a/libweston/libweston-internal.h b/libweston/libweston-internal.h
index 04c75457..5cbe8190 100644
--- a/libweston/libweston-internal.h
+++ b/libweston/libweston-internal.h
@@ -311,4 +311,9 @@ weston_matrix_transform_region(pixman_region32_t *dest,
 			       struct weston_matrix *matrix,
 			       pixman_region32_t *src);
 
+/* protected_surface */
+void
+weston_protected_surface_send_event(struct protected_surface *psurface,
+				    enum weston_hdcp_protection protection);
+
 #endif