diff --git a/src/ipc/event.cr b/src/ipc/event.cr
index 2d763c2..1eade92 100644
--- a/src/ipc/event.cr
+++ b/src/ipc/event.cr
@@ -20,8 +20,8 @@ class IPC::Event::Timer < IPC::Event
 end
 
 class IPC::Event::Base < IPC::Event
-	getter fd : Int
-	getter index : UInt64
+	property fd    : Int32
+	property index : UInt32
 
 	def initialize(@fd, @index) 
 	end