diff --git a/docs/CMakeLists.txt b/docs/CMakeLists.txt
index a4f7629..7333cf3 100644
--- a/docs/CMakeLists.txt
+++ b/docs/CMakeLists.txt
@@ -47,7 +47,7 @@ add_custom_command(OUTPUT ${SPHINX_INDEX_FILE}
 	DEPENDS 
 		# Other docs files you want to track should go here (or in some variable)
 		${CMAKE_CURRENT_SOURCE_DIR}/index.rst
-		${DOXYGEN_INDEX_FILE}
+		Doxygen
 	MAIN_DEPENDENCY ${SPHINX_SOURCE}/conf.py
 	COMMENT "Generating documentation with Sphinx")