diff --git a/src/lib.rs b/src/lib.rs
index 72f7b0f..f2b0b23 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -105,7 +105,7 @@ pub fn raise_fd_limit() -> Option<u64> {
 			panic!("raise_fd_limit: error calling setrlimit: {}", err);
 		}
 
-		Some(rlim.rlim_cur)
+		Some(rlim.rlim_cur.into())
 	}
 }