diff --git a/mosquitto-1.4.12-use-SOURCE_DATE_EPOCH.patch b/mosquitto-1.4.12-use-SOURCE_DATE_EPOCH.patch
new file mode 100644
index 0000000..75f2936
--- /dev/null
+++ b/mosquitto-1.4.12-use-SOURCE_DATE_EPOCH.patch
@@ -0,0 +1,18 @@
+diff -up ./CMakeLists.txt.orig ./CMakeLists.txt
+--- ./CMakeLists.txt.orig	2017-03-19 13:11:32.426142255 +0100
++++ ./CMakeLists.txt	2017-03-19 13:15:02.626150970 +0100
+@@ -17,8 +17,13 @@ if (WIN32)
+ 	execute_process(COMMAND cmd /c echo %DATE% %TIME% OUTPUT_VARIABLE TIMESTAMP
+ 			OUTPUT_STRIP_TRAILING_WHITESPACE)
+ else (WIN32)
+-	execute_process(COMMAND date "+%F %T%z" OUTPUT_VARIABLE TIMESTAMP
++	if(DEFINED ENV{SOURCE_DATE_EPOCH})
++		execute_process(COMMAND date -d "@$ENV{SOURCE_DATE_EPOCH}" "+%F %T%z" OUTPUT_VARIABLE TIMESTAMP
+ 			OUTPUT_STRIP_TRAILING_WHITESPACE)
++	else()
++		execute_process(COMMAND date "+%F %T%z" OUTPUT_VARIABLE TIMESTAMP
++			OUTPUT_STRIP_TRAILING_WHITESPACE)
++	endif()
+ endif (WIN32)
+ 
+ add_definitions (-DCMAKE -DVERSION=\"${VERSION}\" -DTIMESTAMP=\"${TIMESTAMP}\")
diff --git a/mosquitto.changes b/mosquitto.changes
index bc78c15..049e81d 100644
--- a/mosquitto.changes
+++ b/mosquitto.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Fri Jul  7 18:33:53 UTC 2017 - antoine.belvire@opensuse.org
+
+- Add mosquitto-1.4.12-use-SOURCE_DATE_EPOCH.patch: Determine build
+  timestamp from latest revision of .changes file in order to make
+  the build reproducible and avoid useless republishing.
+
 -------------------------------------------------------------------
 Wed Jul  5 20:35:17 UTC 2017 - mardnh@gmx.de
 
diff --git a/mosquitto.spec b/mosquitto.spec
index a6c3e57..6931bfb 100644
--- a/mosquitto.spec
+++ b/mosquitto.spec
@@ -35,7 +35,9 @@ Source2:        mosquitto.fw
 Source4:        README-conf-d
 Source5:        README-ca_certificates
 Source6:        README-certs
-Patch:          mosquitto-1.4.1_apparmor.patch
+Patch0:         mosquitto-1.4.1_apparmor.patch
+# PATCH-FIX-UPSTREAM mosquitto-1.4.12-use-SOURCE_DATE_EPOCH.patch -- Make the build reproducible
+Patch1:         mosquitto-1.4.12-use-SOURCE_DATE_EPOCH.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  cmake
 BuildRequires:  gcc-c++
@@ -136,7 +138,8 @@ Client for Mosquitto.
 
 %prep
 %setup -q
-%patch -p1
+%patch0 -p1
+%patch1
 find misc -type f -print0 | xargs -r0 chmod a-x
 
 %build