diff --git a/googletest/src/gtest.cc b/googletest/src/gtest.cc
index 99b22ed..dcf4e26 100644
--- a/googletest/src/gtest.cc
+++ b/googletest/src/gtest.cc
@@ -43,6 +43,7 @@
 #include <algorithm>
 #include <chrono>  // NOLINT
 #include <cmath>
+#include <csignal>
 #include <cstdint>
 #include <cstdlib>
 #include <cstring>