diff --git a/pkgs/development/compilers/llvm/common/common-let.nix b/pkgs/development/compilers/llvm/common/common-let.nix
index 31360f5b98b9..828f83bd9959 100644
--- a/pkgs/development/compilers/llvm/common/common-let.nix
+++ b/pkgs/development/compilers/llvm/common/common-let.nix
@@ -8,7 +8,10 @@
 
 rec {
   llvm_meta = {
-    license = lib.licenses.ncsa;
+    license = with lib.licenses; [ ncsa ] ++
+      # Contributions after June 1st, 2024 are only licensed under asl20-llvm:
+      # https://github.com/llvm/llvm-project/pull/92394
+      lib.optional (lib.versionAtLeast release_version "19") asl20-llvm;
     maintainers = lib.teams.llvm.members;
 
     # See llvm/cmake/config-ix.cmake.