diff --git a/libpkgconf.pc.in b/libpkgconf.pc.in
index 05aa0eb..0a7e07d 100644
--- a/libpkgconf.pc.in
+++ b/libpkgconf.pc.in
@@ -7,6 +7,7 @@ Name: libpkgconf
 Description: a library for accessing and manipulating development framework configuration
 URL: https://gitea.treehouse.systems/ariadne/pkgconf
 License: ISC
+License.file: https://raw.githubusercontent.com/pkgconf/pkgconf/refs/heads/master/COPYING
 Source: https://github.com/pkgconf/pkgconf
 Version: @PACKAGE_VERSION@
 CFlags: -I${includedir}/pkgconf