diff --git a/cmake/python.rules.txt b/cmake/python.rules.txt
index 54f78804..b7d37ade 100644
--- a/cmake/python.rules.txt
+++ b/cmake/python.rules.txt
@@ -1,7 +1,7 @@
-FUNCTION(PYTHON_SOURCES_COMPILE python_files sems_python_dir)
+MACRO(PYTHON_SOURCES_COMPILE python_files sems_python_dir)
 	FOREACH (python_file ${python_files})
 		EXECUTE_PROCESS(COMMAND python -c "import py_compile; py_compile.compile('${CMAKE_CURRENT_SOURCE_DIR}/${python_file}')")
 		EXECUTE_PROCESS(COMMAND python -O -c "import py_compile; py_compile.compile('${CMAKE_CURRENT_SOURCE_DIR}/${python_file}')")
 		INSTALL (FILES ${python_file} ${python_file}c ${python_file}o DESTINATION ${SEMS_EXEC_PREFIX}/${SEMS_LIBDIR}/sems/${sems_python_dir})
 	ENDFOREACH(python_file ${python_files})
-ENDFUNCTION()
+ENDMACRO(PYTHON_SOURCES_COMPILE python_files sems_python_dir)