diff --git a/CMakeLists.txt b/CMakeLists.txt
index d4b3c1b2..483aa85f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -142,7 +142,9 @@ if(SPDLOG_BUILD_PIC)
 endif()
 
 find_package(Threads REQUIRED)
-message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
+if(DEFINED CMAKE_BUILD_TYPE)
+    message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
+endif()
 # ---------------------------------------------------------------------------------------
 # Static/Shared library
 # ---------------------------------------------------------------------------------------