diff --git a/py-polars/polars/dataframe/frame.py b/py-polars/polars/dataframe/frame.py
index ecd9552f1d0a..257d806b258c 100644
--- a/py-polars/polars/dataframe/frame.py
+++ b/py-polars/polars/dataframe/frame.py
@@ -1767,7 +1767,7 @@ def to_jax(
             "for specific installation recommendations for the Jax package",
         )
         enabled_double_precision = jx.config.jax_enable_x64 or bool(
-            int(os.environ.get("JAX_ENABLE_X64", "1"))
+            int(os.environ.get("JAX_ENABLE_X64", "0"))
         )
         if dtype:
             frame = self.cast(dtype)