diff --git a/lib/dtutils/system.lua b/lib/dtutils/system.lua
index b668faf..0425a10 100644
--- a/lib/dtutils/system.lua
+++ b/lib/dtutils/system.lua
@@ -1,6 +1,7 @@
 local dtutils_system = {}
 
 local dt = require "darktable"
+require "official/yield"  -- necessary for dt.control.execute()
 
 dtutils_system.libdoc = {
   Name = [[dtutils.system]],