--- physmap.c	2013-04-17 11:40:46.861911531 +0200
+++ physmap-fix.c	2013-04-17 11:46:07.169907130 +0200
@@ -413,7 +413,7 @@
 {
 	struct amdmsr_req args;
 
-	args.msr = addr;
+	args.addr = (uint32_t)addr;
 	args.val = (((uint64_t)msr.hi) << 32) | msr.lo;
 
 	if (ioctl(fd_msr, WRMSR, &args) < 0) {