diff --git a/mkosi.conf.d/05-tools/mkosi.conf b/mkosi.conf.d/05-tools/mkosi.conf
index 15c336a304..322851b627 100644
--- a/mkosi.conf.d/05-tools/mkosi.conf
+++ b/mkosi.conf.d/05-tools/mkosi.conf
@@ -3,6 +3,7 @@
 [Build]
 ToolsTreePackages=
         gcc
+        gdb
         gperf
         lcov
         llvm