diff --git a/arc-gcc4.patch b/arc-gcc4.patch
new file mode 100644
index 0000000..5d4f214
--- /dev/null
+++ b/arc-gcc4.patch
@@ -0,0 +1,18 @@
+--- arc-5.21j/marc.c.gcc4	2005-05-25 17:17:58.000000000 -0400
++++ arc-5.21j/marc.c	2005-05-25 17:18:39.000000000 -0400
+@@ -28,6 +28,7 @@
+ #if	UNIX
+ #include <sys/types.h>
+ #include <sys/stat.h>
++#include <string.h>
+ #endif
+ 
+ #ifndef	__STDC__
+@@ -48,7 +49,6 @@
+ int nargs;			       /* number of arguments */
+ char *arg[];			       /* pointers to arguments */
+ {
+-    char *makefnam();		       /* filename fixup routine */
+     char *envfind();
+ #if	!_MTS
+     char *arctemp2, *mktemp();		/* temp file stuff */
diff --git a/arc.spec b/arc.spec
index 2482d1d..48b726e 100644
--- a/arc.spec
+++ b/arc.spec
@@ -1,6 +1,6 @@
 Name:      arc
 Version:   5.21j
-Release: 3
+Release: 4
 
 Summary:   Arc archiver
 
@@ -8,6 +8,7 @@ Group:     Applications/Archiving
 License:   GPL
 URL:       ftp://ftp.freebsd.org/pub/FreeBSD/distfiles/
 Source:    ftp://ftp.freebsd.org/pub/FreeBSD/distfiles/%{name}-%{version}.tar.gz
+Patch0: arc-gcc4.patch
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 %description
@@ -15,7 +16,8 @@ Arc file archiver and compressor. Long since superseded by zip/unzip
 but useful if you have old .arc files you need to unpack.
 
 %prep
-%setup
+%setup -q
+%patch0 -p1 -b .gcc4
 
 sed -i \
   -e 's,^OPT =.*$,OPT = ${RPM_OPT_FLAGS},' \
@@ -40,6 +42,9 @@ rm -fr %{buildroot}
 %attr (0755,root,root) %{_bindir}/*
 
 %changelog
+* Wed May 25 2005 Jeremy Katz <katzj@redhat.com> - 5.21j-4
+- fix build with gcc4, patch from Nicolas Mailhot (#156225)
+
 * Sun May 22 2005 Ralf Corsepius <ralf[AT]links2linux.de>
 - Use RPM_OPT_CFLAGS inside of Makefile.