diff --git a/pkgs/development/compilers/llvm/common/clang-tools/wrapper b/pkgs/development/compilers/llvm/common/clang-tools/wrapper
index 1008023fdc0d1..2cb84ece693b0 100755
--- a/pkgs/development/compilers/llvm/common/clang-tools/wrapper
+++ b/pkgs/development/compilers/llvm/common/clang-tools/wrapper
@@ -4,7 +4,7 @@ buildcpath() {
   local path after
   while (( $# )); do
     case $1 in
-        -isystem)
+        -isystem|-cxx-isystem)
             shift
             path=$path${path:+':'}$1
             ;;