diff --git a/DDCore/src/VolumeManager.cpp b/DDCore/src/VolumeManager.cpp
index 446f44eb8ac61c6c99855376aa2eb593b7a4ba49..d58a29e828f4692918a0ed013fb82f70a081d6a0 100644
--- a/DDCore/src/VolumeManager.cpp
+++ b/DDCore/src/VolumeManager.cpp
@@ -153,7 +153,7 @@ namespace {
     }
 
     /// Compute the encoding for a set of VolIDs within a readout descriptor
-    static pair<VolumeID, VolumeID> encoding(const IDDescriptor iddesc, const VolIDs& ids) const {
+    static pair<VolumeID, VolumeID> encoding(const IDDescriptor iddesc, const VolIDs& ids)  {
       VolumeID volume_id = 0, mask = 0;
       for (VolIDs::const_iterator i = ids.begin(); i != ids.end(); ++i) {
         const PlacedVolume::VolID& id = (*i);