diff --git a/dovecot.spec b/dovecot.spec
index c84e3ac73524b313d540658d876a0f9046f3a891..9df42bc67fbccc878fbb035f1c54a21928eb6b1a 100644
--- a/dovecot.spec
+++ b/dovecot.spec
@@ -6,7 +6,7 @@
 
 Name:          dovecot
 Version:       2.3.15
-Release:       4
+Release:       5
 Summary:       Dovecot Secure imap server
 License:       MIT and LGPLv2.1
 URL:           http://www.dovecot.org/
@@ -35,6 +35,8 @@ Patch6009:     dovecot-2.3.11-bigkey.patch
 Patch6010:     dovecot-2.3.6-opensslhmac.patch
 Patch6011:     dovecot-2.3.15-fixvalcond.patch
 Patch6012:     dovecot-2.3.15-valbasherr.patch
+# https://github.com/dovecot/core/commit/6d902507c24fca4f64e3e9bf7d79ae5a48281cd8
+Patch0013:     test-cpu-limit-remove-checking-for-CPU-usage-upper-limit.patch
 
 BuildRequires: gcc-c++ openssl-devel pam-devel zlib-devel bzip2-devel libcap-devel
 BuildRequires: libtool autoconf automake pkgconfig sqlite-devel libpq-devel
@@ -304,6 +306,9 @@ make check
 
 
 %changelog
+* Wed Aug 10 2022 yaoxin <yaoxin30@ha-partners.com> - 1:2.3.15-5
+- Fix build failure
+
 * Mon Feb 21 2022 caodongxia <caodongxia@huawei.com> - 2.3.15-4
 - Add requires tar for dovecot-sysreport command
 
diff --git a/test-cpu-limit-remove-checking-for-CPU-usage-upper-limit.patch b/test-cpu-limit-remove-checking-for-CPU-usage-upper-limit.patch
new file mode 100644
index 0000000000000000000000000000000000000000..1f03eac91c5374e0e7d34c9339a68e82aee9df95
--- /dev/null
+++ b/test-cpu-limit-remove-checking-for-CPU-usage-upper-limit.patch
@@ -0,0 +1,60 @@
+From 6d902507c24fca4f64e3e9bf7d79ae5a48281cd8 Mon Sep 17 00:00:00 2001
+From: Timo Sirainen <timo.sirainen@open-xchange.com>
+Date: Tue, 21 Sep 2021 13:38:27 +0300
+Subject: [PATCH] lib: test-cpu-limit - Remove checking for CPU usage upper
+ limit
+
+These tests keep randomly failing on loaded systems. It's more important
+anyway to check that the minimum CPU usage is high enough than it is to
+check that CPU usage isn't too high.
+---
+ src/lib/test-cpu-limit.c | 10 ----------
+ 1 file changed, 10 deletions(-)
+
+diff --git a/src/lib/test-cpu-limit.c b/src/lib/test-cpu-limit.c
+index 23ac923f2f..aefb92ab7d 100644
+--- a/src/lib/test-cpu-limit.c
++++ b/src/lib/test-cpu-limit.c
+@@ -68,8 +68,6 @@ test_cpu_limit_simple(enum cpu_limit_type type, const char *type_str)
+ 	cpu = get_cpu_time(type);
+ 	diff_msecs = timeval_diff_msecs(&cpu, &usage);
+ 	test_assert_cmp(diff_msecs, >=, 2000 - ALLOW_MSECS_BELOW);
+-	if ((type & CPU_LIMIT_TYPE_SYSTEM) == 0)
+-		test_assert_cmp(diff_msecs, <=, 2000 + ALLOW_MSECS_ABOVE);
+ 
+ 	lib_signals_deinit();
+ 	test_end();
+@@ -100,16 +98,12 @@ static void test_cpu_limit_nested(enum cpu_limit_type type, const char *type_str
+ 		/* we may have looped only for a short time in case climit1
+ 		   was triggered during this loop. */
+ 		diff_msecs = timeval_diff_msecs(&cpu, &usage2);
+-		if ((type & CPU_LIMIT_TYPE_SYSTEM) == 0)
+-			test_assert_cmp(diff_msecs, <=, 1000 + ALLOW_MSECS_ABOVE);
+ 	}
+ 
+ 	cpu_limit_deinit(&climit1);
+ 	cpu = get_cpu_time(type);
+ 	diff_msecs = timeval_diff_msecs(&cpu, &usage1);
+ 	test_assert_cmp(diff_msecs, >=, 3000 - ALLOW_MSECS_BELOW);
+-	if ((type & CPU_LIMIT_TYPE_SYSTEM) == 0)
+-		test_assert_cmp(diff_msecs, <=, 3000 + ALLOW_MSECS_ABOVE);
+ 
+ 	lib_signals_deinit();
+ 	test_end();
+@@ -138,16 +132,12 @@ static void test_cpu_limit_nested(enum cpu_limit_type type, const char *type_str
+ 		/* we may have looped only for a short time in case climit1
+ 		   was triggered during this loop. */
+ 		diff_msecs = timeval_diff_msecs(&cpu, &usage2);
+-		if ((type & CPU_LIMIT_TYPE_SYSTEM) == 0)
+-			test_assert_cmp(diff_msecs, <=, 1000 + ALLOW_MSECS_ABOVE);
+ 	}
+ 
+ 	cpu_limit_deinit(&climit1);
+ 	cpu = get_cpu_time(type);
+ 	diff_msecs = timeval_diff_msecs(&cpu, &usage1);
+ 	test_assert_cmp(diff_msecs, >=, 3000 - ALLOW_MSECS_BELOW);
+-	if ((type & CPU_LIMIT_TYPE_SYSTEM) == 0)
+-		test_assert_cmp(diff_msecs, <=, 3000 + ALLOW_MSECS_ABOVE);
+ 
+ 	i_unlink_if_exists(test_path);
+ 	lib_signals_deinit();