diff --git a/sys/amd64/amd64/fpu.c b/sys/amd64/amd64/fpu.c
index db817468116d..b8147575dd6a 100644
--- a/sys/amd64/amd64/fpu.c
+++ b/sys/amd64/amd64/fpu.c
@@ -32,7 +32,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)npx.c	7.2 (Berkeley) 5/12/91
- *	$Id: npx.c,v 1.33 1996/11/15 20:27:14 bde Exp $
+ *	$Id: npx.c,v 1.34 1996/11/30 14:08:44 bde Exp $
  */
 
 #include "npx.h"
@@ -367,10 +367,12 @@ npxattach(dvp)
 		}
 		if (!(dvp->id_flags & NPX_DISABLE_I586_OPTIMIZED_BZERO))
 			bzero = i586_bzero;
+#ifdef notyet
 		if (!(dvp->id_flags & NPX_DISABLE_I586_OPTIMIZED_COPYIO)) {
 			copyin_vector = i586_copyin;
 			copyout_vector = i586_copyout;
 		}
+#endif
 	}
 #endif
 
diff --git a/sys/amd64/isa/npx.c b/sys/amd64/isa/npx.c
index db817468116d..b8147575dd6a 100644
--- a/sys/amd64/isa/npx.c
+++ b/sys/amd64/isa/npx.c
@@ -32,7 +32,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)npx.c	7.2 (Berkeley) 5/12/91
- *	$Id: npx.c,v 1.33 1996/11/15 20:27:14 bde Exp $
+ *	$Id: npx.c,v 1.34 1996/11/30 14:08:44 bde Exp $
  */
 
 #include "npx.h"
@@ -367,10 +367,12 @@ npxattach(dvp)
 		}
 		if (!(dvp->id_flags & NPX_DISABLE_I586_OPTIMIZED_BZERO))
 			bzero = i586_bzero;
+#ifdef notyet
 		if (!(dvp->id_flags & NPX_DISABLE_I586_OPTIMIZED_COPYIO)) {
 			copyin_vector = i586_copyin;
 			copyout_vector = i586_copyout;
 		}
+#endif
 	}
 #endif
 
diff --git a/sys/i386/isa/npx.c b/sys/i386/isa/npx.c
index db817468116d..b8147575dd6a 100644
--- a/sys/i386/isa/npx.c
+++ b/sys/i386/isa/npx.c
@@ -32,7 +32,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)npx.c	7.2 (Berkeley) 5/12/91
- *	$Id: npx.c,v 1.33 1996/11/15 20:27:14 bde Exp $
+ *	$Id: npx.c,v 1.34 1996/11/30 14:08:44 bde Exp $
  */
 
 #include "npx.h"
@@ -367,10 +367,12 @@ npxattach(dvp)
 		}
 		if (!(dvp->id_flags & NPX_DISABLE_I586_OPTIMIZED_BZERO))
 			bzero = i586_bzero;
+#ifdef notyet
 		if (!(dvp->id_flags & NPX_DISABLE_I586_OPTIMIZED_COPYIO)) {
 			copyin_vector = i586_copyin;
 			copyout_vector = i586_copyout;
 		}
+#endif
 	}
 #endif