diff --git a/tools/db_crashtest.py b/tools/db_crashtest.py
index c71c8c99d..59528128b 100644
--- a/tools/db_crashtest.py
+++ b/tools/db_crashtest.py
@@ -56,7 +56,7 @@ default_params = {
     "write_buffer_size": 4 * 1024 * 1024,
     "writepercent": 35,
     "format_version": lambda: random.randint(2, 4),
-    "index_block_restart_interval": lambda: random.choice(1, 16),
+    "index_block_restart_interval": lambda: random.choice(range(1, 16)),
 }
 
 _TEST_DIR_ENV_VAR = 'TEST_TMPDIR'