1 files changed, 1 insertions, 1 deletions

diff --git a/io/event.h b/io/event.h
index 2da3323..e17c333 100644
--- a/io/event.h
+++ b/io/event.h
@@ -9,7 +9,7 @@ struct event {
     ctlreg reg;
     std::uint_fast32_t mask;
     std::uint_fast32_t value;
-    event(ctlreg reg, std::uint_fast32_t value, std::uint_fast32_t mask=~0)
+    event(ctlreg reg, std::uint_fast32_t value, std::uint_fast32_t mask=~(std::uint_fast32_t)0)
         : reg(reg)
         , mask(mask)
         , value(value)