diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index e0df9b6a1d..8053aa3f11 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -285,6 +285,9 @@ void cpu_exec_step_atomic(CPUState *cpu)
 
     if (sigsetjmp(cpu->jmp_env, 0) == 0) {
         start_exclusive();
+        g_assert(cpu == current_cpu);
+        g_assert(!cpu->running);
+        cpu->running = true;
 
         tb = tb_lookup__cpu_state(cpu, &pc, &cs_base, &flags, cf_mask);
         if (tb == NULL) {
@@ -323,6 +326,7 @@ void cpu_exec_step_atomic(CPUState *cpu)
      */
     g_assert(cpu_in_exclusive_context(cpu));
     parallel_cpus = true;
+    cpu->running = false;
     end_exclusive();
 }