diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index baab19b301b646029063a067fcb64652b5c08b76..6b99511623862a4c0a01b91ce48927dcb1695b28 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -109,6 +109,9 @@ include_directories("${PROJECT_BINARY_DIR}/conf")
 
 INCLUDE_DIRECTORIES(.)
 
+# include spdlog (logging) third_party
+INCLUDE_DIRECTORIES(../third_party/spdlog/include)
+
 INCLUDE_DIRECTORIES(${EIGEN_INCLUDE_DIRS})
 
 IF(Ceres_FOUND)