diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 8ccc7a3..d98fc71 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -136,10 +136,18 @@
 
 if(UNIX)
     add_custom_target(polarssl
-        DEPENDS mbedtls # TODO: and mbedtls_static is shared is defined
+        DEPENDS mbedtls
         COMMAND ${CMAKE_SOURCE_DIR}/scripts/polarssl_symlinks.sh ${CMAKE_BINARY_DIR}/library
         )
 
+    add_custom_target(lib
+        DEPENDS polarssl
+        )
+
+    set_directory_properties(PROPERTIES
+        ADDITIONAL_MAKE_CLEAN_FILES "${CMAKE_BINARY_DIR}/library/libpolarssl.a"
+        )
+
     if(USE_STATIC_MBEDTLS_LIBRARY AND USE_SHARED_MBEDTLS_LIBRARY)
         add_dependencies(polarssl mbedtls_static)
     endif()