diff --git a/OpenChange/GNUmakefile b/OpenChange/GNUmakefile
index cd4aca1d6..4a0171582 100644
--- a/OpenChange/GNUmakefile
+++ b/OpenChange/GNUmakefile
@@ -41,6 +41,7 @@ $(SOGOBACKEND)_OBJC_FILES += \
 	MAPIStoreMIME.m \
 	MAPIStoreTypes.m \
 	MAPIStorePropertySelectors.m \
+	MAPIStoreSamDBUtils.m \
 	\
 	SOGoMAPIVolatileMessage.m \
 	SOGoMAPIFSFolder.m \