diff --git a/common/time_util.h b/common/time_util.h
index c1840495..d778a18f 100644
--- a/common/time_util.h
+++ b/common/time_util.h
@@ -32,7 +32,7 @@ either expressed or implied, of the Regents of The University of Michigan.
 #include <time.h>
 
 #ifdef _WIN32
-#include <windows.h>
+#include <Winsock2.h>
 typedef long long suseconds_t;
 #endif