diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8fb8e66..1e98af5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,7 @@ include_directories(${Boost_INCLUDE_DIR})
 # Include modules
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/src)
 
-option(PING_CPP_BUILD_TESTS "" ON)
+option(PING_CPP_BUILD_TESTS "Build the test cases when PING_CPP_BUILD_TESTS is enabled." ON)
 message("Building tests: ${PING_CPP_BUILD_TESTS}")
 
 if (PING_CPP_BUILD_TESTS)