diff --git a/ssa/interp/external.go b/ssa/interp/external.go
index 969d61ab..8df7cf54 100644
--- a/ssa/interp/external.go
+++ b/ssa/interp/external.go
@@ -333,10 +333,6 @@ func ext۰syscall۰Getpid(fn *ssa.Function, args []value) value {
 	return syscall.Getpid()
 }
 
-func ext۰syscall۰RawSyscall(fn *ssa.Function, args []value) value {
-	return tuple{uintptr(0), uintptr(0), uintptr(syscall.ENOSYS)}
-}
-
 func valueToBytes(v value) []byte {
 	in := v.([]value)
 	b := make([]byte, len(in))
diff --git a/ssa/interp/external_plan9.go b/ssa/interp/external_plan9.go
index 7c02360d..6afb6437 100644
--- a/ssa/interp/external_plan9.go
+++ b/ssa/interp/external_plan9.go
@@ -5,8 +5,6 @@
 package interp
 
 import (
-	"syscall"
-
 	"code.google.com/p/go.tools/ssa"
 )
 
@@ -42,3 +40,6 @@ func ext۰syscall۰Write(fn *ssa.Function, args []value) value {
 	n, err := write(args[0].(int), valueToBytes(args[1]))
 	return tuple{n, wrapError(err)}
 }
+func ext۰syscall۰RawSyscall(fn *ssa.Function, args []value) value {
+	return tuple{^uintptr(0), uintptr(0), uintptr(0)}
+}
diff --git a/ssa/interp/external_unix.go b/ssa/interp/external_unix.go
index fd5e3fb9..e6dbdd3e 100644
--- a/ssa/interp/external_unix.go
+++ b/ssa/interp/external_unix.go
@@ -126,3 +126,7 @@ func ext۰syscall۰Write(fn *ssa.Function, args []value) value {
 	n, err := write(args[0].(int), valueToBytes(args[1]))
 	return tuple{n, wrapError(err)}
 }
+
+func ext۰syscall۰RawSyscall(fn *ssa.Function, args []value) value {
+	return tuple{uintptr(0), uintptr(0), uintptr(syscall.ENOSYS)}
+}
diff --git a/ssa/interp/external_windows.go b/ssa/interp/external_windows.go
index bbd272a5..77a04949 100644
--- a/ssa/interp/external_windows.go
+++ b/ssa/interp/external_windows.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build windows plan9
-
 package interp
 
 import (
@@ -40,3 +38,6 @@ func ext۰syscall۰Stat(fn *ssa.Function, args []value) value {
 func ext۰syscall۰Write(fn *ssa.Function, args []value) value {
 	panic("syscall.Write not yet implemented")
 }
+func ext۰syscall۰RawSyscall(fn *ssa.Function, args []value) value {
+	return tuple{uintptr(0), uintptr(0), uintptr(syscall.ENOSYS)}
+}