diff --git a/src/HybridAffineFEOperators.jl b/src/HybridAffineFEOperators.jl
index 3edf305..77ddd53 100644
--- a/src/HybridAffineFEOperators.jl
+++ b/src/HybridAffineFEOperators.jl
@@ -322,7 +322,7 @@ end
 
 function _find_bulk(D, dc::DomainContribution)
     [trian for trian in keys(dc.dict)
-     if isa(trian, Triangulation{D,D}) && !(isa(trian, SkeletonTriangulation))]
+     if isa(trian, Triangulation{D}) && !(isa(trian, SkeletonTriangulation))]
 end
 
 function _find_boundary(dc::DomainContribution)