diff --git a/src/logging.c b/src/logging.c
index d32ca43..b0bca54 100644
--- a/src/logging.c
+++ b/src/logging.c
@@ -577,8 +577,9 @@
 void log_set_category_filter(struct log_target *target, int category,
 			       int enable, int level)
 {
-	if (category >= osmo_log_info->num_cat)
+	if (!target)
 		return;
+	category = map_subsys(category);
 	target->categories[category].enabled = !!enable;
 	target->categories[category].loglevel = level;
 }
diff --git a/tests/logging/logging_test.err b/tests/logging/logging_test.err
index 4527d83..17b3cad 100644
--- a/tests/logging/logging_test.err
+++ b/tests/logging/logging_test.err
@@ -6,3 +6,4 @@
 DLGLOBAL You should see this on DLGLOBAL (c)
 DLGLOBAL You should see this on DLGLOBAL (d)
 DLGLOBAL You should see this on DLGLOBAL (e)
+DLGLOBAL You should see this (DLGLOBAL on DEBUG)