diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 0254226a42..e38552ca1c 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -3553,6 +3553,9 @@ static int do_fork(CPUState *env, unsigned int flags, abi_ulong newsp,
         new_stack = ts->stack;
         /* we create a new CPU instance. */
         new_env = cpu_copy(env);
+#if defined(TARGET_I386) || defined(TARGET_SPARC) || defined(TARGET_PPC)
+        cpu_reset(new_env);
+#endif
         /* Init regs that differ from the parent.  */
         cpu_clone_regs(new_env, newsp);
         new_env->opaque = ts;