diff --git a/libgo/go/net/interface_windows.go b/libgo/go/net/interface_windows.go
index 2ed66cd..add3dd3 100644
--- a/libgo/go/net/interface_windows.go
+++ b/libgo/go/net/interface_windows.go
@@ -31,7 +31,7 @@
 		a = (*syscall.IpAdapterInfo)(unsafe.Pointer(&b[0]))
 		e = syscall.GetAdaptersInfo(a, &l)
 	}
-	if e != 0 {
+	if e != nil {
 		return nil, os.NewSyscallError("GetAdaptersInfo", e)
 	}
 	return a, nil
@@ -77,7 +77,7 @@
 
 			row := syscall.MibIfRow{Index: index}
 			e := syscall.GetIfEntry(&row)
-			if e != 0 {
+			if e != nil {
 				return nil, os.NewSyscallError("GetIfEntry", e)
 			}