diff --git a/src/proto/popupmenu.pro b/src/proto/popupmenu.pro
new file mode 100644
index 0000000..98fac22
--- /dev/null
+++ b/src/proto/popupmenu.pro
@@ -0,0 +1,8 @@
+/* popupmenu.c */
+void pum_display __ARGS((char_u **array, int size, int selected, int row, int height, int col));
+void pum_redraw __ARGS((void));
+void pum_set_selected __ARGS((int n));
+void pum_undisplay __ARGS((void));
+void pum_clear __ARGS((void));
+int pum_visible __ARGS((void));
+/* vim: set ft=c : */