diff --git a/apcu-upstream.patch b/apcu-upstream.patch
new file mode 100644
index 0000000..256dc6a
--- /dev/null
+++ b/apcu-upstream.patch
@@ -0,0 +1,40 @@
+From c6812973fbc29d13368b2ad45a016f4839ee141e Mon Sep 17 00:00:00 2001
+From: Remi Collet <fedora@famillecollet.com>
+Date: Wed, 20 Apr 2016 09:18:38 +0200
+Subject: [PATCH] fix #176 segfault when apc.preload_path contains bad data
+
+---
+ apc_cache.c         | 2 +-
+ tests/data/abc.data | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/apc_cache.c b/apc_cache.c
+index af5b584..5118e77 100644
+--- a/apc_cache.c
++++ b/apc_cache.c
+@@ -391,7 +391,7 @@ static zval* data_unserialize(const char *filename TSRMLS_DC)
+         return NULL;
+     }
+ 
+-    MAKE_STD_ZVAL(retval);
++    ALLOC_INIT_ZVAL(retval);
+ 
+     PHP_VAR_UNSERIALIZE_INIT(var_hash);
+     
+
+From d9cbfab0bbcdf33a2b26a1c2382e882264835230 Mon Sep 17 00:00:00 2001
+From: Remi Collet <fedora@famillecollet.com>
+Date: Tue, 19 Apr 2016 17:35:31 +0200
+Subject: [PATCH] fix test/data
+
+---
+ tests/data/abc.data | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/tests/data/abc.data b/tests/data/abc.data
+index 0e386ce..ecdc6cf 100644
+--- a/tests/data/abc.data
++++ b/tests/data/abc.data
+@@ -1 +1 @@
+-s:3:"123"
++s:3:"123";
diff --git a/php-pecl-apcu.spec b/php-pecl-apcu.spec
index e47cdd4..63bd33d 100644
--- a/php-pecl-apcu.spec
+++ b/php-pecl-apcu.spec
@@ -22,12 +22,14 @@
 Name:           php-pecl-apcu
 Summary:        APC User Cache
 Version:        4.0.10
-Release:        3%{?dist}
+Release:        4%{?dist}
 Source0:        http://pecl.php.net/get/%{pecl_name}-%{version}.tgz
 Source1:        %{pecl_name}.ini
 Source2:        %{pecl_name}-panel.conf
 Source3:        %{pecl_name}.conf.php
 
+Patch0:         %{pecl_name}-upstream.patch
+
 License:        PHP
 Group:          Development/Languages
 URL:            http://pecl.php.net/package/APCu
@@ -127,6 +129,7 @@ configuration, available on http://localhost/apcu-panel/
 mv %{pecl_name}-%{version} NTS
 
 cd NTS
+%patch0 -p1
 
 # Sanity check, really often broken
 extver=$(sed -n '/#define PHP_APCU_VERSION/{s/.* "//;s/".*$//;p}' php_apc.h)
@@ -255,6 +258,9 @@ REPORT_EXIT_STATUS=1 \
 
 
 %changelog
+* Wed Apr 20 2016 Remi Collet <remi@fedoraproject.org> - 4.0.10-4
+- add upstream patch, fix FTBFS with 5.6.21RC1, thanks Koschei
+
 * Wed Feb 10 2016 Remi Collet <remi@fedoraproject.org> - 4.0.10-3
 - drop scriptlets (replaced file triggers in php-pear)