diff --git a/include/ceres/rotation.h b/include/ceres/rotation.h
index 16bfc8a..7f05187 100644
--- a/include/ceres/rotation.h
+++ b/include/ceres/rotation.h
@@ -47,6 +47,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include "glog/logging.h"
 
 namespace ceres {