diff --git a/mach/m68k4/libsys/dup2.s b/mach/m68k4/libsys/dup2.s
index 9d5a20ef9..2924bc822 100644
--- a/mach/m68k4/libsys/dup2.s
+++ b/mach/m68k4/libsys/dup2.s
@@ -4,5 +4,5 @@
 _dup2:		move.w #0x29,d0
 		move.l 4(sp),a0
 		move.l 8(sp),d1
-		or.l #0x40,a0
+		add.l #0x40,a0
 		jmp call
diff --git a/mach/m68k4/libsys/pipe.s b/mach/m68k4/libsys/pipe.s
index 2cb786e37..8d5edc605 100644
--- a/mach/m68k4/libsys/pipe.s
+++ b/mach/m68k4/libsys/pipe.s
@@ -1,7 +1,7 @@
 .define _pipe
 .extern _pipe
 _pipe:		
-		mov.w #0x2A,d0
+		move.w #0x2A,d0
 		trap #0
 		bcc 1f
 		jmp cerror