diff --git a/platformio/ide/tpls/clion/CMakeListsPrivate.txt.tpl b/platformio/ide/tpls/clion/CMakeListsPrivate.txt.tpl
index 00556e3b..3397a070 100644
--- a/platformio/ide/tpls/clion/CMakeListsPrivate.txt.tpl
+++ b/platformio/ide/tpls/clion/CMakeListsPrivate.txt.tpl
@@ -22,4 +22,4 @@ include_directories("{{include.replace("\\", "/")}}")
 % end
 % end
 
-aux_source_directory({{project_src_dir}} SRC_LIST)
+aux_source_directory({{project_src_dir.replace("\\", "/")}} SRC_LIST)