diff --git a/drivers/syslog/vsyslog.c b/drivers/syslog/vsyslog.c
index 063f15491bb..ecc2f65bad3 100644
--- a/drivers/syslog/vsyslog.c
+++ b/drivers/syslog/vsyslog.c
@@ -28,6 +28,7 @@
 #include <syslog.h>
 #include <errno.h>
 
+#include <nuttx/arch.h>
 #include <nuttx/init.h>
 #include <nuttx/arch.h>
 #include <nuttx/clock.h>
@@ -147,6 +148,10 @@ int nx_vsyslog(int priority, FAR const IPTR char *fmt, FAR va_list *ap)
   ret = 0;
 #endif
 
+#if defined(CONFIG_SMP)
+  ret += lib_sprintf(&stream.public, "[CPU%d] ", up_cpu_index());
+#endif
+
 #if defined(CONFIG_SYSLOG_PROCESSID)
   /* Prepend the Process ID */