diff --git a/internal/ceres/compressed_row_jacobian_writer.cc b/internal/ceres/compressed_row_jacobian_writer.cc
index 6ee7226..d21aa7d 100644
--- a/internal/ceres/compressed_row_jacobian_writer.cc
+++ b/internal/ceres/compressed_row_jacobian_writer.cc
@@ -30,6 +30,7 @@
 
 #include "ceres/compressed_row_jacobian_writer.h"
 
+#include <iterator>
 #include <utility>
 #include <vector>