diff --git a/lib/auxlib.c b/lib/auxlib.c
index 9c724176b..60b1f75a5 100644
--- a/lib/auxlib.c
+++ b/lib/auxlib.c
@@ -139,6 +139,9 @@ void config_load(int *argc, char ***argv, GOptionEntry *app_entries, const char
 			case G_OPTION_ARG_INT:
 				CONF_OPTION_GLUE(integer, int);
 
+			case G_OPTION_ARG_DOUBLE:
+				CONF_OPTION_GLUE(double, double);
+
 			case G_OPTION_ARG_STRING:
 			case G_OPTION_ARG_FILENAME:
 				CONF_OPTION_GLUE(string, char *);