diff --git a/contrib/bc/src/main.c b/contrib/bc/src/main.c
index e4a1f7399bb4..da4c27156029 100644
--- a/contrib/bc/src/main.c
+++ b/contrib/bc/src/main.c
@@ -1,128 +1,128 @@
 /*
  * *****************************************************************************
  *
  * SPDX-License-Identifier: BSD-2-Clause
  *
  * Copyright (c) 2018-2024 Gavin D. Howard and contributors.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * * Redistributions of source code must retain the above copyright notice, this
  *   list of conditions and the following disclaimer.
  *
  * * Redistributions in binary form must reproduce the above copyright notice,
  *   this list of conditions and the following disclaimer in the documentation
  *   and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
  * *****************************************************************************
  *
  * The entry point for bc.
  *
  */
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 #if BC_ENABLE_NLS
 #include <locale.h>
 #endif // BC_ENABLE_NLS
 
 #ifndef _WIN32
 #include <libgen.h>
 #endif // _WIN32
 
 #include <setjmp.h>
 
 #include <version.h>
 #include <status.h>
 #include <vm.h>
 #include <bc.h>
 #include <dc.h>
 
 int
-main(int argc, char* argv[])
+main(int argc, const char* argv[])
 {
 	BcStatus s;
 	char* name;
 	size_t len = strlen(BC_EXECPREFIX);
 
 #if BC_ENABLE_NLS
 	// Must set the locale properly in order to have the right error messages.
 	vm->locale = setlocale(LC_ALL, "");
 #endif // BC_ENABLE_NLS
 
 	// Set the start pledge().
 	bc_pledge(bc_pledge_start, NULL);
 
 	// Sometimes, argv[0] can be NULL. Better make sure to be robust against it.
 	if (argv[0] != NULL)
 	{
 		// Figure out the name of the calculator we are using. We can't use
 		// basename because it's not portable, but yes, this is stripping off
 		// the directory.
 		name = strrchr(argv[0], BC_FILE_SEP);
 		vm->name = (name == NULL) ? argv[0] : name + 1;
 	}
 	else
 	{
 #if !DC_ENABLED
 		vm->name = "bc";
 #elif !BC_ENABLED
 		vm->name = "dc";
 #else
 		// Just default to bc in that case.
 		vm->name = "bc";
 #endif
 	}
 
 	// If the name is longer than the length of the prefix, skip the prefix.
 	if (strlen(vm->name) > len) vm->name += len;
 
 	BC_SIG_LOCK;
 
 	// We *must* do this here. Otherwise, other code could not jump out all of
 	// the way.
 	bc_vec_init(&vm->jmp_bufs, sizeof(sigjmp_buf), BC_DTOR_NONE);
 
 	BC_SETJMP_LOCKED(vm, exit);
 
 #if BC_CLANG
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wcast-qual"
 #endif // BC_CLANG
 #if !DC_ENABLED
 	s = bc_main(argc, (const char**) argv);
 #elif !BC_ENABLED
 	s = dc_main(argc, (const char**) argv);
 #else
 	// BC_IS_BC uses vm->name, which was set above. So we're good.
 	if (BC_IS_BC) s = bc_main(argc, (const char**) argv);
 	else s = dc_main(argc, (const char**) argv);
 #endif
 #if BC_CLANG
 #pragma clang diagnostic pop
 #endif // BC_CLANG
 
 	vm->status = (sig_atomic_t) s;
 
 exit:
 	BC_SIG_MAYLOCK;
 
 	s = bc_vm_atexit((BcStatus) vm->status);
 
 	return (int) s;
 }