diff --git a/Modules/FindPostgreSQL.cmake b/Modules/FindPostgreSQL.cmake
index fba0ca0e4..e3541bca3 100644
--- a/Modules/FindPostgreSQL.cmake
+++ b/Modules/FindPostgreSQL.cmake
@@ -143,6 +143,8 @@ find_library(PostgreSQL_LIBRARY
    ${PostgreSQL_ROOT_DIRECTORIES}
  PATH_SUFFIXES
    lib
+ # Help the user find it if we cannot.
+ DOC "The ${PostgreSQL_LIBRARY_DIR_MESSAGE}"
 )
 get_filename_component(PostgreSQL_LIBRARY_DIR ${PostgreSQL_LIBRARY} PATH)