1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/um/ptrace_64.c b/arch/x86/um/ptrace_64.c
index a5c9910d234f..09a085bde0d4 100644
--- a/arch/x86/um/ptrace_64.c
+++ b/arch/x86/um/ptrace_64.c
@@ -125,7 +125,7 @@ int poke_user(struct task_struct *child, long addr, long data)
         else if ((addr >= offsetof(struct user, u_debugreg[0])) &&
                 (addr <= offsetof(struct user, u_debugreg[7]))) {
                 addr -= offsetof(struct user, u_debugreg[0]);
-                addr = addr >> 2;
+                addr = addr >> 3;
                 if ((addr == 4) || (addr == 5))
                         return -EIO;
                 child->thread.arch.debugregs[addr] = data;