diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index dccc87e8fee5e6544de0d8fc732a97aa14f45907..e0c3d2dc7ca3f73a6a6ffc08b34ea18fc4d31b0e 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1307,6 +1307,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 
 		f = ret_from_fork;
 	}
+	childregs->msr &= ~(MSR_FP|MSR_VEC|MSR_VSX);
 	sp -= STACK_FRAME_OVERHEAD;
 
 	/*