--- gdbmseq.c
+++ gdbmseq.c
@@ -41,6 +41,8 @@
    at ELEM_LOC of the current bucket and using RETURN_VAL as the place to
    put the data that is found. */
 
+static void get_next_key __P((gdbm_file_info *, int, datum *));
+
 static void
 get_next_key (dbf, elem_loc, return_val)
      gdbm_file_info *dbf;