diff --git a/building/eis_toolkit_binary.spec b/building/eis_toolkit_binary.spec
index 95a2ae2d..2f8c11f4 100644
--- a/building/eis_toolkit_binary.spec
+++ b/building/eis_toolkit_binary.spec
@@ -1,5 +1,5 @@
 import glob, os
-from PyInstaller.utils.hooks import collect_dynamic_libs
+from PyInstaller.utils.hooks import collect_dynamic_libs, collect_submodules
 
 hiddenimports = collect_submodules('encodings')