diff --git a/third-party/unittest/googletest/src/gtest.cc b/third-party/unittest/googletest/src/gtest.cc
index 30a5cc3f83a7e..37d380a789831 100644
--- a/third-party/unittest/googletest/src/gtest.cc
+++ b/third-party/unittest/googletest/src/gtest.cc
@@ -43,6 +43,7 @@
 #include <algorithm>
 #include <chrono>  // NOLINT
 #include <cmath>
+#include <csignal>
 #include <cstdint>
 #include <cstdlib>
 #include <cstring>