diff --git a/cmake/find/poco.cmake b/cmake/find/poco.cmake
index e749fc27925..99233728152 100644
--- a/cmake/find/poco.cmake
+++ b/cmake/find/poco.cmake
@@ -1,8 +1,6 @@
 option (USE_INTERNAL_POCO_LIBRARY "Use internal Poco library" ON)
 
-if (USE_INTERNAL_POCO_LIBRARY)
-    set (LIBRARY_DIR ${ClickHouse_SOURCE_DIR}/contrib/poco)
-else ()
+if (NOT USE_INTERNAL_POCO_LIBRARY)
     find_path (ROOT_DIR NAMES Foundation/include/Poco/Poco.h include/Poco/Poco.h)
     if (NOT ROOT_DIR)
         message (${RECONFIGURE_MESSAGE_LEVEL} "Can't find system poco")
diff --git a/contrib/poco-cmake/CMakeLists.txt b/contrib/poco-cmake/CMakeLists.txt
index fff9051f40f..1d2dc7b873e 100644
--- a/contrib/poco-cmake/CMakeLists.txt
+++ b/contrib/poco-cmake/CMakeLists.txt
@@ -1,3 +1,5 @@
+set (LIBRARY_DIR ${ClickHouse_SOURCE_DIR}/contrib/poco)
+
 add_subdirectory (Crypto)
 add_subdirectory (Data)
 add_subdirectory (Data/ODBC)