diff --git a/lib/stdio-impl.h b/lib/stdio-impl.h
index 766d6936590..1972a33ab13 100644
--- a/lib/stdio-impl.h
+++ b/lib/stdio-impl.h
@@ -26,7 +26,9 @@
 # include <sys/param.h>
 #endif
 
+#ifndef __MINGW32__
 #include <errno.h>                             /* For detecting Plan9.  */
+#endif
 
 #if defined __sferror || defined __DragonFly__ || defined __ANDROID__
   /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */