diff --git a/fhem/FHEM/55_GDS.pm b/fhem/FHEM/55_GDS.pm
index 39450a0da..2eba279e7 100644
--- a/fhem/FHEM/55_GDS.pm
+++ b/fhem/FHEM/55_GDS.pm
@@ -102,7 +102,7 @@ sub GDS_Initialize($) {
 	CommandDefine(undef, "gds_web HTTPSRV gds /tmp/ GDS Files");
 	createIndexFile();
 	fillMappingTables();
-	initDropdownLists
+	initDropdownLists();
 	
 }