diff --git a/snapshotprocessor.py b/snapshotprocessor.py
index 4d20f1e..e1cf944 100644
--- a/snapshotprocessor.py
+++ b/snapshotprocessor.py
@@ -1883,7 +1883,7 @@ class SnapshotProcessor(HDF5Container):
                 averageables.append(name + "_avg")
 
             # special for vectors
-            if field in ["g", "vel"]:
+            if field in ["g", "vel", "Bl", "Br"]:
                 # Components
                 for i, dir in enumerate(["x", "y", "z"]):
                     generic_rule(