diff --git a/tests/unit/forklift/test_legacy.py b/tests/unit/forklift/test_legacy.py
index de78f0479efa..1ae09aeb065f 100644
--- a/tests/unit/forklift/test_legacy.py
+++ b/tests/unit/forklift/test_legacy.py
@@ -2728,6 +2728,7 @@ def test_upload_attestation_fails_without_oidc_publisher(
             "manylinux_2_17_armv7l",
             "manylinux_2_17_ppc64",
             "manylinux_2_17_ppc64le",
+            "manylinux_2_39_riscv64",
             "manylinux_3_0_s390x",
             "musllinux_1_1_x86_64",
             "macosx_10_5_ppc",
diff --git a/warehouse/forklift/legacy.py b/warehouse/forklift/legacy.py
index 369b3be91367..97f4821010e1 100644
--- a/warehouse/forklift/legacy.py
+++ b/warehouse/forklift/legacy.py
@@ -170,6 +170,7 @@
     "armv7l",
     "ppc64le",
     "s390x",
+    "riscv64",
 }
 _manylinux_arches = _jointlinux_arches | {"ppc64"}
 _musllinux_arches = _jointlinux_arches