diff --git a/python/tvm/relax/transform/legalize_ops/unary.py b/python/tvm/relax/transform/legalize_ops/unary.py
index fc6b96a438e0..4d09c6d61cc8 100644
--- a/python/tvm/relax/transform/legalize_ops/unary.py
+++ b/python/tvm/relax/transform/legalize_ops/unary.py
@@ -38,6 +38,9 @@
 register_legalize("relax.cosh", _call_topi_without_attr(topi.cosh, "tir_cosh"))
 register_legalize("relax.exp", _call_topi_without_attr(topi.exp, "tir_exp"))
 register_legalize("relax.floor", _call_topi_without_attr(topi.floor, "tir_floor"))
+register_legalize("relax.isfinite", _call_topi_without_attr(topi.isfinite, "tir_isfinite"))
+register_legalize("relax.isinf", _call_topi_without_attr(topi.isinf, "tir_isinf"))
+register_legalize("relax.isnan", _call_topi_without_attr(topi.isnan, "tir_isnan"))
 register_legalize("relax.log", _call_topi_without_attr(topi.log, "tir_log"))
 register_legalize("relax.logical_not", _call_topi_without_attr(topi.logical_not, "tir_logical_not"))
 register_legalize("relax.negative", _call_topi_without_attr(topi.negative, "tir_negative"))
diff --git a/tests/python/relax/test_transform_legalize_ops_unary.py b/tests/python/relax/test_transform_legalize_ops_unary.py
index e32f95a3c4d2..4f8ee67d99ee 100644
--- a/tests/python/relax/test_transform_legalize_ops_unary.py
+++ b/tests/python/relax/test_transform_legalize_ops_unary.py
@@ -89,6 +89,9 @@ def main(x: R.Tensor(("m", "n"), dtype)):
         ("exp", R.exp, topi.exp, "float32"),
         ("floor", R.floor, topi.floor, "float32"),
         ("floor", R.floor, topi.identity, "int32"),
+        ("isfinite", R.isfinite, topi.isfinite, "float32"),
+        ("isinf", R.isinf, topi.isinf, "float32"),
+        ("isnan", R.isnan, topi.isnan, "float32"),
         ("log", R.log, topi.log, "float32"),
         ("negative", R.negative, topi.negative, "float32"),
         ("round", R.round, topi.round, "float32"),