diff --git a/development/scons/scons_manifest.py b/development/scons/scons_manifest.py
index 06883b2a05..d96b174f13 100644
--- a/development/scons/scons_manifest.py
+++ b/development/scons/scons_manifest.py
@@ -334,6 +334,7 @@ src_support_files = Split('''
     Package.cpp
     Path.cpp
     SignalSlot.cpp
+    SignalSlotPrivate.cpp
     Systemcall.cpp
     Timeout.cpp
     convert.cpp