diff --git a/libusb.odin b/libusb.odin
index 05222da..6d17fb2 100644
--- a/libusb.odin
+++ b/libusb.odin
@@ -1103,9 +1103,9 @@ Poll_Fd :: struct {
 	events: posix.Poll_Event,
 }
 
-Poll_FD_Added_CB :: #type proc "c" (fd: c.int, events: posix.Poll_Event, user_date: rawptr)
+Poll_FD_Added_CB :: #type proc "c" (fd: posix.FD, events: posix.Poll_Event, user_data: rawptr)
 
-Poll_FD_Removed_CB :: #type proc "c" (fd: c.int, user_data: rawptr)
+Poll_FD_Removed_CB :: #type proc "c" (fd: posix.FD, user_data: rawptr)
 
 @(default_calling_convention = "c", link_prefix = "libusb_")
 foreign lib {