diff --git a/packages/Varieties/SheafComplexes.m2 b/packages/Varieties/SheafComplexes.m2
index ca4b275..045be6e 100644
--- a/packages/Varieties/SheafComplexes.m2
+++ b/packages/Varieties/SheafComplexes.m2
@@ -50,6 +50,12 @@ complex' List := Complex => opts -> L -> (
     error "expected a list of matrices or a list of modules";
     )
 
+sheaf Complex := Complex => C -> (
+    (lo,hi) := concentration C;
+    complex' for i from lo+1 to hi list sheaf C.dd_i
+    )
+    
+
 -*
 map(Complex, Complex, HashTable) := ComplexMap => opts -> (tar, src, maps) -> (
     R := ring tar;