diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index 69fea5663..85d7c6765 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -69,7 +69,7 @@ if(Boost_PYTHON${BOOST_PYTHON_VERSION_SUFFIX_UPPERCASE}_FOUND AND PYTHONLIBS_FOU
 		add_custom_command(
 			OUTPUT ${PY_SRC}
 			DEPENDS ${PY_SRC}
-			COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_CURRENT_SOURCE_DIR}/${PY_SRC} ${CMAKE_CURRENT_BINARY_DIR}/${PY_SRC}
+			COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/${PY_SRC} ${CMAKE_CURRENT_BINARY_DIR}/${PY_SRC}
 			COMMENT "Copying python/${PY_SRC}"
 		)
 		add_custom_target(copy_${PY_SRC_TARGET_SUFFIX} DEPENDS ${PY_SRC})