--- a/cmake/TestBigEndian.cmake
+++ b/cmake/TestBigEndian.cmake
@@ -56,7 +56,7 @@ macro(TEST_BIG_ENDIAN VARIABLE)
     endif()
 
 
-    configure_file("${CMAKE_ROOT}/Modules/TestEndianess.c.in"
+    configure_file("${CMAKE_ROOT}/Modules/TestEndianness.c.in"
                    "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
                    @ONLY)