diff --git a/legacy/embryo/src/lib/embryo_time.c b/legacy/embryo/src/lib/embryo_time.c
index 3b7b91d661..8392ec362a 100644
--- a/legacy/embryo/src/lib/embryo_time.c
+++ b/legacy/embryo/src/lib/embryo_time.c
@@ -9,6 +9,10 @@
 #include <sys/time.h>
 #include <time.h>
 
+#ifdef _MSC_VER
+# include <winsock2.h>
+#endif
+
 #ifdef HAVE_EVIL
 # include <Evil.h>
 #endif