diff --git a/clang/test/lit.cfg.py b/clang/test/lit.cfg.py
index 1957bb1715eb6..a1e0406daafe8 100644
--- a/clang/test/lit.cfg.py
+++ b/clang/test/lit.cfg.py
@@ -316,7 +316,7 @@ def is_filesystem_case_insensitive():
 
 # [PR8833] LLP64-incompatible tests
 if not re.match(
-    r"^(aarch64|x86_64).*-(windows-msvc|windows-gnu)$", config.target_triple
+    r"^(aarch64|arm64ec|x86_64).*-(windows-msvc|windows-gnu)$", config.target_triple
 ):
     config.available_features.add("LP64")