diff --git a/msm/synx/synx_api.h b/msm/synx/synx_api.h
index 0c2cd78a1f..09a36d0003 100644
--- a/msm/synx/synx_api.h
+++ b/msm/synx/synx_api.h
@@ -14,6 +14,12 @@
 
 #define SYNX_NO_TIMEOUT        ((u64)-1)
 
+/**
+ * SYNX_INVALID_HANDLE      : client can assign the synx handle variable with this value
+ *                            when it doesn't hold a valid synx handle
+ */
+#define SYNX_INVALID_HANDLE 0
+
 /**
  * enum synx_create_flags - Flags passed during synx_create call
  *