diff --git a/src/utils/fluid_sys.c b/src/utils/fluid_sys.c
index d686737f..ee2fd677 100644
--- a/src/utils/fluid_sys.c
+++ b/src/utils/fluid_sys.c
@@ -1343,12 +1343,12 @@ fluid_ostream_printf(fluid_ostream_t out, const char *format, ...)
         /* Handle write differently depending on if its a socket or file descriptor */
         if(!(out & FLUID_SOCKET_FLAG))
         {
-            return write(out, buf, FLUID_STRLEN(buf));
+            return write(out, buf, (unsigned int)FLUID_STRLEN(buf));
         }
 
 #ifdef NETWORK_SUPPORT
         /* Socket */
-        retval = send(out & ~FLUID_SOCKET_FLAG, buf, FLUID_STRLEN(buf), 0);
+        retval = send(out & ~FLUID_SOCKET_FLAG, buf, (int)FLUID_STRLEN(buf), 0);
         return retval != SOCKET_ERROR ? retval : -1;
 #else
         return -1;