diff --git a/include/ui/gtk.h b/include/ui/gtk.h
index ee6dffd306..0359333fce 100644
--- a/include/ui/gtk.h
+++ b/include/ui/gtk.h
@@ -1,10 +1,6 @@
 #ifndef UI_GTK_H
 #define UI_GTK_H
 
-#ifdef _WIN32
-# define _WIN32_WINNT 0x0601 /* needed to get definition of MAPVK_VK_TO_VSC */
-#endif
-
 #ifdef CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE
 /* Work around an -Wstrict-prototypes warning in GTK headers */
 #pragma GCC diagnostic push
diff --git a/ui/gtk.c b/ui/gtk.c
index 187de74b2c..3057cdc3f7 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -104,6 +104,15 @@
 #define GDK_KEY_Pause GDK_Pause
 #endif
 
+/* Some older mingw versions lack this constant or have
+ * it conditionally defined */
+#ifdef _WIN32
+# ifndef MAPVK_VK_TO_VSC
+#  define MAPVK_VK_TO_VSC 0
+# endif
+#endif
+
+
 #define HOTKEY_MODIFIERS        (GDK_CONTROL_MASK | GDK_MOD1_MASK)
 
 static const int modifier_keycode[] = {