diff --git a/pkgs/development/tools/misc/ccls/wrapper b/pkgs/development/tools/misc/ccls/wrapper
index c92bc6b40d1..294b60893a3 100644
--- a/pkgs/development/tools/misc/ccls/wrapper
+++ b/pkgs/development/tools/misc/ccls/wrapper
@@ -4,6 +4,6 @@ printf -v extraArgs ',\"%s\"' \
   $(cat @clang@/nix-support/libc-cflags \
         @clang@/nix-support/libcxx-cxxflags) \
   ${NIX_CFLAGS_COMPILE}
-initString="--init={\"clang\":{\"extraArgs\":[${extraArgs:1}]}}"
+initString="--init={\"clang\":{\"extraArgs\":[${extraArgs:1}],\"resourceDir\":\"@clang@/resource-root\"}}"
 
 exec -a "$0" "@out@/bin/@wrapped@" "${initString}" "$@"