diff --git a/include/libs/monitor/clientMonitor.h b/include/libs/monitor/clientMonitor.h
index 3bb325921e..0085173ecd 100644
--- a/include/libs/monitor/clientMonitor.h
+++ b/include/libs/monitor/clientMonitor.h
@@ -38,7 +38,7 @@ typedef enum {
   SLOW_LOG_READ_QUIT = 3,
 } SLOW_LOG_QUEUE_TYPE;
 
-char* queueTypeStr[] = {
+static char* queueTypeStr[] = {
   "SLOW_LOG_WRITE",
   "SLOW_LOG_READ_RUNNING",
   "SLOW_LOG_READ_BEGINNIG",