diff --git a/src/sf_define.h b/src/sf_define.h
index 2c9e7a7..58c04cd 100644
--- a/src/sf_define.h
+++ b/src/sf_define.h
@@ -54,7 +54,8 @@
 #define SF_RETRIABLE_ERROR_CHANNEL_INVALID 9915  //client should re-setup channel
 
 //std errno wrapper for crossing platform
-#define SF_ERROR_EINVAL       8811
+#define SF_ERROR_EBUSY        8816
+#define SF_ERROR_EINVAL       8822
 #define SF_ERROR_EAGAIN       8835
 #define SF_ERROR_EOVERFLOW    8884
 
diff --git a/src/sf_util.h b/src/sf_util.h
index 42fed5b..1d093d6 100644
--- a/src/sf_util.h
+++ b/src/sf_util.h
@@ -93,6 +93,8 @@ static inline void sf_setup_schedule(struct log_context *pContext,
 static inline int sf_unify_errno(const int errnum)
 {
     switch (errnum) {
+        case EBUSY:
+            return SF_ERROR_EBUSY;
         case EINVAL:
             return SF_ERROR_EINVAL;
         case EAGAIN:
@@ -107,6 +109,8 @@ static inline int sf_unify_errno(const int errnum)
 static inline int sf_localize_errno(const int errnum)
 {
     switch (errnum) {
+        case SF_ERROR_EBUSY:
+            return EBUSY;
         case SF_ERROR_EINVAL:
             return EINVAL;
         case SF_ERROR_EAGAIN: