diff --git a/gdk/broadway/broadway-server.c b/gdk/broadway/broadway-server.c
index 37135c5ab8..7c3b334c37 100644
--- a/gdk/broadway/broadway-server.c
+++ b/gdk/broadway/broadway-server.c
@@ -12,7 +12,11 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#elif defined (G_OS_WIN32)
+#include <io.h>
+#endif
 #include <crypt.h>
 #ifdef HAVE_SYS_MMAN_H
 #include <sys/mman.h>
@@ -979,7 +983,7 @@ static gchar *
 generate_handshake_response_wsietf_v7 (const gchar *key)
 {
   gsize digest_len = 20;
-  guchar digest[digest_len];
+  guchar digest[20];
   GChecksum *checksum;
 
   checksum = g_checksum_new (G_CHECKSUM_SHA1);
diff --git a/gdk/broadway/gdkbroadway-server.c b/gdk/broadway/gdkbroadway-server.c
index 27fca43d0e..5017ef27e3 100644
--- a/gdk/broadway/gdkbroadway-server.c
+++ b/gdk/broadway/gdkbroadway-server.c
@@ -18,7 +18,12 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#elif defined (G_OS_WIN32)
+#include <io.h>
+#define ftruncate _chsize_s
+#endif
 #include <sys/types.h>
 #ifdef G_OS_WIN32
 #include <windows.h>
diff --git a/gdk/broadway/gdkdisplay-broadway.c b/gdk/broadway/gdkdisplay-broadway.c
index 70d5edf902..dff7457147 100644
--- a/gdk/broadway/gdkdisplay-broadway.c
+++ b/gdk/broadway/gdkdisplay-broadway.c
@@ -37,7 +37,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <sys/types.h>
 
 static void   gdk_broadway_display_dispose            (GObject            *object);
diff --git a/gdk/broadway/gdkkeys-broadway.c b/gdk/broadway/gdkkeys-broadway.c
index 4c9cc2a939..cf3c029af4 100644
--- a/gdk/broadway/gdkkeys-broadway.c
+++ b/gdk/broadway/gdkkeys-broadway.c
@@ -33,7 +33,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <limits.h>
 #include <errno.h>