diff --git a/ext/bcmath/config.m4 b/ext/bcmath/config.m4
index ee9fa3f3c9e1c..7513f63fef102 100644
--- a/ext/bcmath/config.m4
+++ b/ext/bcmath/config.m4
@@ -7,7 +7,7 @@ if test "$PHP_BCMATH" != "no"; then
   PHP_NEW_EXTENSION(bcmath, bcmath.c \
 libbcmath/src/add.c libbcmath/src/div.c libbcmath/src/init.c libbcmath/src/neg.c libbcmath/src/raisemod.c libbcmath/src/sub.c \
 libbcmath/src/compare.c libbcmath/src/divmod.c libbcmath/src/int2num.c libbcmath/src/num2long.c libbcmath/src/output.c libbcmath/src/recmul.c \
-libbcmath/src/sqrt.c libbcmath/src/zero.c libbcmath/src/debug.c libbcmath/src/doaddsub.c libbcmath/src/nearzero.c libbcmath/src/num2str.c libbcmath/src/raise.c \
+libbcmath/src/sqrt.c libbcmath/src/zero.c libbcmath/src/doaddsub.c libbcmath/src/nearzero.c libbcmath/src/num2str.c libbcmath/src/raise.c \
 libbcmath/src/rmzero.c libbcmath/src/str2num.c,
           $ext_shared,,-I@ext_srcdir@/libbcmath/src -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
   PHP_ADD_BUILD_DIR($ext_builddir/libbcmath/src)
diff --git a/ext/bcmath/config.w32 b/ext/bcmath/config.w32
index 04ffa31d58384..0282315e1ade5 100644
--- a/ext/bcmath/config.w32
+++ b/ext/bcmath/config.w32
@@ -6,7 +6,7 @@ if (PHP_BCMATH == "yes") {
 	EXTENSION("bcmath", "bcmath.c",	null, "-Iext/bcmath/libbcmath/src /DZEND_ENABLE_STATIC_TSRMLS_CACHE=1");
 	ADD_SOURCES("ext/bcmath/libbcmath/src", "add.c div.c init.c neg.c \
 		raisemod.c sub.c compare.c divmod.c int2num.c \
-		num2long.c output.c recmul.c sqrt.c zero.c debug.c doaddsub.c \
+		num2long.c output.c recmul.c sqrt.c zero.c doaddsub.c \
 		nearzero.c num2str.c raise.c rmzero.c str2num.c", "bcmath");
 
 	AC_DEFINE('HAVE_BCMATH', 1, 'Have BCMATH library');
diff --git a/ext/bcmath/libbcmath/src/debug.c b/ext/bcmath/libbcmath/src/debug.c
deleted file mode 100644
index d723dba86fe3c..0000000000000
--- a/ext/bcmath/libbcmath/src/debug.c
+++ /dev/null
@@ -1,60 +0,0 @@
-/* debug.c: bcmath library file. */
-/*
-    Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
-    Copyright (C) 2000 Philip A. Nelson
-
-    This library is free software; you can redistribute it and/or
-    modify it under the terms of the GNU Lesser General Public
-    License as published by the Free Software Foundation; either
-    version 2 of the License, or (at your option) any later version.
-
-    This library is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Lesser General Public License for more details.  (LICENSE)
-
-    You should have received a copy of the GNU Lesser General Public
-    License along with this library; if not, write to:
-
-      The Free Software Foundation, Inc.
-      59 Temple Place, Suite 330
-      Boston, MA 02111-1307 USA.
-
-    You may contact the author by:
-       e-mail:  philnelson@acm.org
-      us-mail:  Philip A. Nelson
-                Computer Science Department, 9062
-                Western Washington University
-                Bellingham, WA 98226-9062
-
-*************************************************************************/
-
-#include <stdio.h>
-#include "bcmath.h"
-#include "private.h"
-#include <stddef.h>
-
-/* pn prints the number NUM in base 10. */
-
-static void out_char(char c)
-{
-	putchar(c);
-}
-
-
-void pn(bc_num num)
-{
-	bc_out_num(num, 10, out_char, 0);
-	out_char('\n');
-}
-
-
-/* pv prints a character array as if it was a string of bcd digits. */
-void pv(char *name, unsigned char *num, size_t len)
-{
-	printf("%s=", name);
-	for (size_t i = 0; i < len; i++) {
-		printf("%c", BCD_CHAR(num[i]));
-	}
-	printf("\n");
-}