fixed segfault on 64 bit platforms

1 files changed, 2 insertions, 2 deletions

diff --git a/threading.h b/threading.h
index f899e73f..2e986b59 100644
--- a/threading.h
+++ b/threading.h
@@ -20,11 +20,11 @@
 
 #include <stdint.h>
 
-int
+intptr_t
 thread_start (void (*fn)(uintptr_t ctx), uintptr_t ctx);
 
 int
-thread_join (int tid);
+thread_join (intptr_t tid);
 
 uintptr_t mutex_create (void);
 void mutex_free (uintptr_t mtx);