diff --git a/CMakeLists.txt b/CMakeLists.txt
index 31c94358..14935d13 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -478,7 +478,7 @@ set (cxx-sources
         plain_server.cpp
         poll.cpp
         poller_base.cpp
-		pollset.cpp
+        pollset.cpp
         precompiled.cpp
         proxy.cpp
         pub.cpp