diff --git a/src/ChangeLog b/src/ChangeLog
index a0f4f3356c6..bca5f49018d 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,4 +1,6 @@
-Mon Dec  6 18:54:04 1999  Eli Zaretskii  <eliz@is.elta.co.il>
+1999-12-06  Eli Zaretskii  <eliz@is.elta.co.il>
+
+	* s/msdos.h (SYSTEM_PURESIZE_EXTRA): Reduce to 40000.
 
 	* insdel.c (adjust_markers_for_delete): Fix last change.
 
diff --git a/src/s/msdos.h b/src/s/msdos.h
index 52b24af2048..0a1f68bb292 100644
--- a/src/s/msdos.h
+++ b/src/s/msdos.h
@@ -266,5 +266,5 @@ You lose; /* Emacs for DOS must be compiled with DJGPP */
 #define LIBX11_SYSTEM -lxext -lsys
 #else
 /* We need a little extra space, see ../../lisp/loadup.el */
-#define SYSTEM_PURESIZE_EXTRA 85000
+#define SYSTEM_PURESIZE_EXTRA 40000
 #endif