diff --git a/linux-user/main.c b/linux-user/main.c
index d1693110fa..42f4a03506 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -122,6 +122,10 @@ int64_t cpu_get_real_ticks(void)
 /***********************************************************/
 /* CPUX86 core interface */
 
+void cpu_smm_update(CPUState *env)
+{
+}
+
 uint64_t cpu_get_tsc(CPUX86State *env)
 {
     return cpu_get_real_ticks();