diff --git a/fdbserver/SigStack.cpp b/fdbserver/SigStack.cpp
index 6ad74ddb63..f00ec5eebc 100644
--- a/fdbserver/SigStack.cpp
+++ b/fdbserver/SigStack.cpp
@@ -19,6 +19,11 @@ extern "C" void stackSignalHandler(int sig) {
 	}
 }
 
+#ifdef _WIN32
+#define SIGUSR1 10
+#define SIGUSR2 12
+#endif
+
 void setupStackSignal() {
 	std::signal(SIGUSR1, &stackSignalHandler);
 }