diff --git a/test/builtins/Unit/lit.cfg.py b/test/builtins/Unit/lit.cfg.py
index 8fdb1a2..d2cd330 100644
--- a/test/builtins/Unit/lit.cfg.py
+++ b/test/builtins/Unit/lit.cfg.py
@@ -111,7 +111,9 @@
     builtins_source_feature_duplicates.append(builtin_source_feature)
 
 if len(builtins_source_feature_duplicates) > 0:
-  lit_config.fatal(
+  # FIXME(dliew): There's a bug in the build system for powerpc where two definitions of the same
+  # function are present in the library. So just downgrade this to a warning until this is fixed.
+  lit_config.warning(
     'builtins_source_features contains duplicates: {}'.format(
       builtins_source_feature_duplicates)
   )