diff --git a/development/scons/scons_manifest.py b/development/scons/scons_manifest.py
index 77db5380d2..1954089ab5 100644
--- a/development/scons/scons_manifest.py
+++ b/development/scons/scons_manifest.py
@@ -1248,6 +1248,7 @@ lib_files = Split('''
     symbols
     syntax.default
     configure.py
+    unicodesymbols
 ''')