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-rw-r--r--Modules/_io/bufferedio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index 4f6dddb..b30d229 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -239,7 +239,7 @@ typedef struct {
#ifdef WITH_THREAD
PyThread_type_lock lock;
- volatile long owner;
+ volatile unsigned long owner;
#endif
Py_ssize_t buffer_size;