diff --git a/sockcompat.c b/sockcompat.c
index ca1bacc..f99d14b 100644
--- a/sockcompat.c
+++ b/sockcompat.c
@@ -32,7 +32,6 @@
 #include "sockcompat.h"
 
 #ifdef _WIN32
-#include <errno.h>
 static int _wsaErrorToErrno(int err) {
     switch (err) {
         case WSAEWOULDBLOCK:
diff --git a/sockcompat.h b/sockcompat.h
index 9249d5e..85810e8 100644
--- a/sockcompat.h
+++ b/sockcompat.h
@@ -49,6 +49,7 @@
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #include <stddef.h>
+#include <errno.h>
 
 #ifdef _MSC_VER
 typedef long long ssize_t;