diff --git a/gtk2_ardour/editor_timefx.cc b/gtk2_ardour/editor_timefx.cc
index 2528c823b7..cc34c49dda 100644
--- a/gtk2_ardour/editor_timefx.cc
+++ b/gtk2_ardour/editor_timefx.cc
@@ -17,6 +17,9 @@
 
 */
 
+#ifdef PLATFORM_WINDOWS
+	#include <windows.h>
+#endif
 #include <iostream>
 #include <cstdlib>
 #include <cmath>
diff --git a/headless/load_session.cc b/headless/load_session.cc
index dc2644c428..b9878b1b30 100644
--- a/headless/load_session.cc
+++ b/headless/load_session.cc
@@ -1,3 +1,7 @@
+#ifdef PLATFORM_WINDOWS
+	#include <windows.h>
+#endif
+
 #include <iostream>
 #include <cstdlib>
 #include <getopt.h>
diff --git a/libs/ardour/globals.cc b/libs/ardour/globals.cc
index 8bee4ec902..3094dc1fdf 100644
--- a/libs/ardour/globals.cc
+++ b/libs/ardour/globals.cc
@@ -15,6 +15,9 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
+#ifdef PLATFORM_WINDOWS
+	#include <windows.h>
+#endif
 
 #ifdef WAF_BUILD
 #include "libardour-config.h"