diff --git a/symfem/elements/bubble.py b/symfem/elements/bubble.py
index 9ffabe9..49ad3c1 100644
--- a/symfem/elements/bubble.py
+++ b/symfem/elements/bubble.py
@@ -37,13 +37,15 @@ def __init__(self, reference: Reference, order: int, variant: str = "equispaced"
         if reference.name in "quadrilateral":
             bubble *= basis[0]
             bubble *= basis[3]
-        if reference.name in "hexahedron":
+        elif reference.name in "hexahedron":
             bubble *= basis[0]
             bubble *= basis[7]
         else:
             for f in basis:
                 bubble *= f
 
+        print(bubble)
+
         if reference.name in ["interval", "quadrilateral", "hexahedron"]:
             o = order - 2
         elif reference.name == "triangle":