diff --git a/include/ceres/dynamic_cost_function_to_functor.h b/include/ceres/dynamic_cost_function_to_functor.h
index 8d174d8..5f47875 100644
--- a/include/ceres/dynamic_cost_function_to_functor.h
+++ b/include/ceres/dynamic_cost_function_to_functor.h
@@ -39,6 +39,7 @@
 #include "ceres/dynamic_cost_function.h"
 #include "ceres/internal/fixed_array.h"
 #include "ceres/internal/port.h"
+#include "glog/logging.h"
 
 namespace ceres {