diff --git a/mace/ops/ops_test_util.h b/mace/ops/ops_test_util.h
index cdba4ee929f7da696e99a2a6524671a79668e4d3..568cbb8f90f6a07203e9f8e9b9533a45bf8682a0 100644
--- a/mace/ops/ops_test_util.h
+++ b/mace/ops/ops_test_util.h
@@ -18,6 +18,7 @@
 #include <functional>
 #include <limits>
 #include <memory>
+#include <random>
 #include <string>
 #include <type_traits>
 #include <utility>