diff --git a/hog/recipes/common.py b/hog/recipes/common.py
index 611a25584f5864d47ef39163e6b2480a4bb962e8..6ebdc77bc5e8225e04e56070db173d6a4a0042e4 100644
--- a/hog/recipes/common.py
+++ b/hog/recipes/common.py
@@ -17,6 +17,6 @@
 
 # Collects common imports for forming integrand and operator recipes.
 import sympy as sp
-from hog.math_helpers import dot, abs, det, double_contraction
+from hog.math_helpers import dot, abs, det, inv, double_contraction
 
-__all__ = ["dot", "abs", "det", "double_contraction", "sp"]
+__all__ = ["sp", "dot", "abs", "det", "inv", "double_contraction"]