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-rw-r--r--erts/emulator/beam/erl_async.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_async.c b/erts/emulator/beam/erl_async.c
index b090564649..ef9644c3d1 100644
--- a/erts/emulator/beam/erl_async.c
+++ b/erts/emulator/beam/erl_async.c
@@ -390,7 +390,7 @@ int check_async_ready(void)
** async_data data to pass to invoke function
** async_free function for relase async_data in case of failure
*/
-long driver_async(ErlDrvPort ix, unsigned int* key,
+long driver_async(ErlDrvPort ix, unsigned long* key,
void (*async_invoke)(void*), void* async_data,
void (*async_free)(void*))
{