diff --git a/clang/cmake/caches/Fuchsia-stage2.cmake b/clang/cmake/caches/Fuchsia-stage2.cmake
--- a/clang/cmake/caches/Fuchsia-stage2.cmake
+++ b/clang/cmake/caches/Fuchsia-stage2.cmake
@@ -287,6 +287,7 @@
   llvm-size
   llvm-strip
   llvm-symbolizer
+  llvm-undname
   llvm-xray
   sancov
   scan-build-py