diff --git a/src/proto/ops.pro b/src/proto/ops.pro
index 5952b95..da9973b 100644
--- a/src/proto/ops.pro
+++ b/src/proto/ops.pro
@@ -29,6 +29,7 @@
 void op_insert __ARGS((oparg_T *oap, long count1));
 int op_change __ARGS((oparg_T *oap));
 void init_yank __ARGS((void));
+void clear_registers __ARGS((void));
 int op_yank __ARGS((oparg_T *oap, int deleting, int mess));
 void do_put __ARGS((int regname, int dir, long count, int flags));
 int preprocs_left __ARGS((void));