diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index d23cf632edf065b7c23b175a00afa1ace9f53b44..0f63dd5972e9a931d23c73c99c970208d0180a78 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -2443,6 +2443,7 @@ static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
 	/* Create a new breakpoint request if one doesn't exist already */
 	hw_breakpoint_init(&attr);
 	attr.bp_addr = hw_brk.address;
+	attr.bp_len = 8;
 	arch_bp_generic_fields(hw_brk.type,
 			       &attr.bp_type);