diff --git a/programming/build/llvm/actions.py b/programming/build/llvm/actions.py
index 8c33bcf4f9..c53c09a20b 100644
--- a/programming/build/llvm/actions.py
+++ b/programming/build/llvm/actions.py
@@ -26,8 +26,8 @@ def setup():
     pisitools.ldflags.add("-fuse-ld=lld")
     pisitools.cflags.remove("-D_FORTIFY_SOURCE=2")
     pisitools.cxxflags.remove("-D_FORTIFY_SOURCE=2")
-    pisitools.cflags.add("-mllvm -polly")
-    pisitools.cxxflags.add("-mllvm -polly")
+    pisitools.cflags.add("-mllvm -polly -Wno-unused-command-line-argument")
+    pisitools.cxxflags.add("-mllvm -polly -Wno-unused-command-line-argument")
     shelltools.export("CC", "clang")
     shelltools.export("CXX", "clang++")
     shelltools.export("AR", "llvm-ar")