diff --git a/lib/SimpleSAML/Metadata/MetaDataStorageSource.php b/lib/SimpleSAML/Metadata/MetaDataStorageSource.php
index 741b8ae2b673230b813acd8a2912da5252d46b76..29268bcb7906ec71590ab374c2e0434fb633e1f2 100644
--- a/lib/SimpleSAML/Metadata/MetaDataStorageSource.php
+++ b/lib/SimpleSAML/Metadata/MetaDataStorageSource.php
@@ -113,7 +113,7 @@ abstract class SimpleSAML_Metadata_MetaDataStorageSource {
 			if(!is_array($entry['hint.cidr'])) continue;
 			
 			foreach ($entry['hint.cidr'] AS $hint_entry) {
-				if (ipCIDRcheck($hint_entry, $ip))
+				if (SimpleSAML_Utilities::ipCIDRcheck($hint_entry, $ip))
 					return $entityId;
 			}