diff --git a/src/libthread/power-ucontext.h b/src/libthread/power-ucontext.h
index 9e50082..27ed339 100644
--- a/src/libthread/power-ucontext.h
+++ b/src/libthread/power-ucontext.h
@@ -12,10 +12,12 @@
 	ulong	toc;		/* callee saved: r2 */
 	ulong	r3;		/* first arg to function, return register: r3 */
 	ulong	gpr[19];	/* callee saved: r13-r31 */
+/*
 // XXX: currently do not save vector registers or floating-point state
 //	ulong	pad;
-//	uvlong	fpr[18];	/* callee saved: f14-f31 */
-//	ulong	vr[4*12];	/* callee saved: v20-v31, 256-bits each */
+//	uvlong	fpr[18];	/ * callee saved: f14-f31 * /
+//	ulong	vr[4*12];	/ * callee saved: v20-v31, 256-bits each * /
+*/
 };
 
 struct ucontext