diff --git a/mingw-filesystem.spec b/mingw-filesystem.spec
index ea9bc69..414b014 100644
--- a/mingw-filesystem.spec
+++ b/mingw-filesystem.spec
@@ -314,6 +314,7 @@ install -m 0644 %{SOURCE12} $RPM_BUILD_ROOT%{_datadir}/mingw/
   * The toolchain files /usr/share/data/mingw/toolchain-mingw32.cmake
     and /usr/share/data/mingw/toolchain-mingw64.cmake don't have
     an uppercase character in their file name any more
+  * Add CMAKE_SYSTEM_PROCESSOR to the CMake toolchain files
 
 * Sat Jun 07 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org>
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
diff --git a/toolchain-mingw32.cmake b/toolchain-mingw32.cmake
index da8846b..878257d 100644
--- a/toolchain-mingw32.cmake
+++ b/toolchain-mingw32.cmake
@@ -1,4 +1,5 @@
 SET(CMAKE_SYSTEM_NAME Windows)
+SET(CMAKE_SYSTEM_PROCESSOR x86)
 
 # specify the cross compiler
 SET(CMAKE_C_COMPILER /usr/bin/i686-w64-mingw32-gcc)
diff --git a/toolchain-mingw64.cmake b/toolchain-mingw64.cmake
index 5f70ced..d6b36a7 100644
--- a/toolchain-mingw64.cmake
+++ b/toolchain-mingw64.cmake
@@ -1,4 +1,5 @@
 SET(CMAKE_SYSTEM_NAME Windows)
+SET(CMAKE_SYSTEM_PROCESSOR x86_64)
 
 # specify the cross compiler
 SET(CMAKE_C_COMPILER /usr/bin/x86_64-w64-mingw32-gcc)