diff --git a/src/proto/ops.pro b/src/proto/ops.pro
index de4ae73..ef044e7 100644
--- a/src/proto/ops.pro
+++ b/src/proto/ops.pro
@@ -23,6 +23,7 @@
 int get_spec_reg(int regname, char_u **argp, int *allocated, int errmsg);
 int cmdline_paste_reg(int regname, int literally, int remcr);
 void adjust_clip_reg(int *rp);
+void shift_delete_registers(void);
 int op_delete(oparg_T *oap);
 int op_replace(oparg_T *oap, int c);
 void op_tilde(oparg_T *oap);