diff --git a/xrdpapi/xrdpapi.c b/xrdpapi/xrdpapi.c
index f35c8210..e3b63035 100644
--- a/xrdpapi/xrdpapi.c
+++ b/xrdpapi/xrdpapi.c
@@ -163,7 +163,7 @@ mysend(int sck, const void* adata, int bytes)
     int error;
     const char* data;
 
-    data = (char*)adata;
+    data = (const char*)adata;
     sent = 0;
     while (sent < bytes)
     {