diff --git a/which-2.21-path_max.patch b/which-2.21-path_max.patch
new file mode 100644
index 0000000..eec9958
--- /dev/null
+++ b/which-2.21-path_max.patch
@@ -0,0 +1,46 @@
+diff -up which-2.21/which.c.me which-2.21/which.c
+--- which-2.21/which.c.me	2022-11-07 13:11:03.580798950 +0100
++++ which-2.21/which.c	2022-11-07 15:45:41.366085798 +0100
+@@ -19,10 +19,15 @@
+ #include "sys.h"
+ #include <stdio.h>
+ #include <ctype.h>
++#include <limits.h>
+ #include "getopt.h"
+ #include "tilde/tilde.h"
+ #include "bash.h"
+ 
++#ifndef PATH_MAX
++#define PATH_MAX 4096
++#endif
++
+ static const char *progname;
+ 
+ static void print_usage(FILE *out)
+@@ -63,7 +68,7 @@ static void print_fail(const char *name,
+   fprintf(stderr, "%s: no %s in (%s)\n", progname, name, path_list);
+ }
+ 
+-static char home[256];
++static char home[PATH_MAX];
+ static size_t homelen = 0;
+ 
+ static int absolute_path_given;
+@@ -163,7 +168,7 @@ static char *find_command_in_path(const
+   return (found);
+ }
+ 
+-static char cwd[256];
++static char cwd[PATH_MAX];
+ static size_t cwdlen;
+ 
+ static void get_current_working_directory(void)
+@@ -195,7 +200,7 @@ static void get_current_working_director
+ 
+ static char *path_clean_up(const char *path)
+ {
+-  static char result[256];
++  static char result[PATH_MAX];
+ 
+   const char *p1 = path;
+   char *p2 = result;
diff --git a/which.spec b/which.spec
index 89370c2..ab99c50 100644
--- a/which.spec
+++ b/which.spec
@@ -1,12 +1,14 @@
 Summary: Displays where a particular program in your path is located
 Name: which
 Version: 2.21
-Release: 28%{?dist}
+Release: 29%{?dist}
 License: GPLv3
 Source0: http://ftp.gnu.org/gnu/which/%{name}-%{version}.tar.gz
 Source1: which2.sh
 Source2: which2.csh
 Patch0: which-2.21-coverity-fixes.patch
+Patch1: which-2.21-path_max.patch
+
 Url: https://savannah.gnu.org/projects/which/
 BuildRequires: make
 BuildRequires:  gcc
@@ -19,6 +21,7 @@ the specified program is in your PATH.
 %prep
 %setup -q
 %patch0 -p1 -b .coverity
+%patch1 -p1 -b .path_max
 
 %build
 %configure
@@ -40,6 +43,9 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
 %{_mandir}/man1/which.1*
 
 %changelog
+* Mon Mar 27 2023 Than Ngo <than@redhat.com> - 2.21-29
+- Resolves: #2181974, which fails for long path
+
 * Fri Apr 15 2022 Than Ngo <than@redhat.com> - 2.21-28
 - Resolves: #2050996, error on login when using ksh as the default shell