More sprintf -> PyOS_snprintf.
diff --git a/Python/thread_beos.h b/Python/thread_beos.h
index 3f84347..74eab2e 100644
--- a/Python/thread_beos.h
+++ b/Python/thread_beos.h
@@ -123,7 +123,8 @@
 
 	/* We are so very thread-safe... */
 	this_thread = atomic_add( &thread_count, 1 );
-	sprintf( name, "python thread (%d)", this_thread );
+	PyOS_snprintf(name, sizeof(name),
+		      "python thread (%d)", this_thread );
 
 	tid = spawn_thread( (thread_func)func, name,
 	                    B_NORMAL_PRIORITY, arg );
@@ -222,7 +223,7 @@
 	}
 
 	this_lock = atomic_add( &lock_count, 1 );
-	sprintf( name, "python lock (%d)", this_lock );
+	PyOS_snprintf(name, sizeof(name), "python lock (%d)", this_lock);
 
 	retval = benaphore_create( name, lock );
 	if( retval != EOK ) {