diff --git a/packaging/CMakeLists.txt b/packaging/CMakeLists.txt
index e8773434..b8917d1f 100644
--- a/packaging/CMakeLists.txt
+++ b/packaging/CMakeLists.txt
@@ -1,6 +1,7 @@
 set(APP_ID "pizza.isle.Isle")
 set(APP_NAME "Isle Decomp")
 set(APP_SUMMARY "Portable version of the LEGO Island Decompilation Project")
+set(APP_SPDX "LGPL-3.0-or-later")
 set(QT_VERSION 6.8)
 
 string(TIMESTAMP BUILD_DATE UTC)
diff --git a/packaging/linux/isle_decomp.metainfo.xml.in b/packaging/linux/isle_decomp.metainfo.xml.in
index 4a5bd6a7..74b66083 100644
--- a/packaging/linux/isle_decomp.metainfo.xml.in
+++ b/packaging/linux/isle_decomp.metainfo.xml.in
@@ -21,7 +21,7 @@
   <url type="bugtracker">https://github.com/isledecomp/isle-portable/issues</url>
 
   <metadata_license>MIT</metadata_license>
-  <project_license>GPL-3.0-or-later</project_license>
+  <project_license>@APP_SPDX@</project_license>
 
   <requires>
     <display_length side="longest" compare="ge">640</display_length>