diff --git a/mach/pdp/libem/RT.s b/mach/pdp/libem/RT.s
index 72e101207..ef9cb78b5 100644
--- a/mach/pdp/libem/RT.s
+++ b/mach/pdp/libem/RT.s
@@ -1,6 +1,27 @@
 / $Header$
+	.globl PRr2,PR2r2,PR4r2,PR6r2
+	.globl PRr2r4,PR2r2r4,PR4r2r4,PR6r2r4
 	.globl RT,RTr2,RTr2r4
 
+PR6r2:	mov $6,r0;br PRr2
+PR4r2:	mov $4,r0;br PRr2
+PR2r2:	mov $2,r0
+PRr2:	mov r5,r1
+	mov sp,r5
+	sub r0,sp
+	mov r2,-(sp)
+	mov r1,pc
+
+PR2r2r4:mov $2,r0;br PRr2r4
+PR4r2r4:mov $4,r0;br PRr2r4
+PR6r2r4:mov $6,r0
+PRr2r4:	mov r5,r1
+	mov sp,r5
+	sub r0,sp
+	mov r2,-(sp)
+	mov r4,-(sp)
+	mov r1,pc
+
 RTr2r4:
 	mov (sp)+,r4
 RTr2: