diff --git a/awesomeConfig.cmake b/awesomeConfig.cmake
index 610025ee..c10109b1 100644
--- a/awesomeConfig.cmake
+++ b/awesomeConfig.cmake
@@ -28,6 +28,11 @@ add_definitions(-std=gnu99 -ggdb3 -fno-strict-aliasing -Wall -Wextra
     -Wstrict-prototypes)
 # }}}
 
+# {{{ Endianness
+include(TestBigEndian)
+TEST_BIG_ENDIAN(AWESOME_IS_BIG_ENDIAN)
+# }}}
+
 # {{{ Find external utilities
 macro(a_find_program var prg req)
     set(required ${req})
diff --git a/config.h.in b/config.h.in
index 2f4d2f9e..9241050e 100644
--- a/config.h.in
+++ b/config.h.in
@@ -1,8 +1,9 @@
 #ifndef _CONFIG_H_
 #define _CONFIG_H_
 
-#define AWESOME_LUA_LIB_PATH "@AWESOME_LUA_LIB_PATH@"
-#define XDG_CONFIG_DIR       "@XDG_CONFIG_DIR@"
+#define AWESOME_LUA_LIB_PATH  "@AWESOME_LUA_LIB_PATH@"
+#define XDG_CONFIG_DIR        "@XDG_CONFIG_DIR@"
+#define AWESOME_IS_BIG_ENDIAN @AWESOME_IS_BIG_ENDIAN@
 
 #cmakedefine WITH_DBUS