diff --git a/src/callproc.c b/src/callproc.c
index 3b1417bd540..9fa852ef6f0 100644
--- a/src/callproc.c
+++ b/src/callproc.c
@@ -52,7 +52,6 @@ extern char *strerror ();
 #endif
 
 #ifdef MSDOS	/* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
-#include "msdos.h"
 #define INCLUDED_FCNTL
 #include <fcntl.h>
 #include <sys/stat.h>
@@ -78,6 +77,10 @@ extern char *strerror ();
 #include "syssignal.h"
 #include "systty.h"
 
+#ifdef MSDOS
+#include "msdos.h"
+#endif
+
 #ifdef VMS
 extern noshare char **environ;
 #else