diff --git a/boulder/data/macros/actions/misc.yaml b/boulder/data/macros/actions/misc.yaml
index c867af4b..c51a2467 100644
--- a/boulder/data/macros/actions/misc.yaml
+++ b/boulder/data/macros/actions/misc.yaml
@@ -1,5 +1,14 @@
 actions:
 
+    - gtk_update_icon_cache:
+        description: Pregenerate icon cache at build time
+        example:
+            %gtk_update_icon_cache
+        command: |
+            for i in %(installroot)%(datadir)/icons/*/; do
+                gtk-update-icon-cache -f $i
+            done
+
     - install_bin:
         description: Install files to %(bindir)
         example: |