1 files changed, 1 insertions, 1 deletions
diff --git a/nio.h b/nio.h
index 60e1b0926..995766dc9 100644
--- a/nio.h
+++ b/nio.h
@@ -64,7 +64,7 @@ WARN_UNUSED
 int nio_check(struct nio * io, int index, int events);
 
 WARN_UNUSED
-int nio_is_valid(struct nio const * const io, int index);
+int nio_is_valid(struct nio const * io, int index);
 
 WARN_UNUSED
 int nio_get_fd(struct nio * io, int index);