diff --git a/src/direct/sparseblocks.jl b/src/direct/sparseblocks.jl
index 18d6ce7..cbbc11a 100644
--- a/src/direct/sparseblocks.jl
+++ b/src/direct/sparseblocks.jl
@@ -163,11 +163,8 @@ struct SparseBlockIndex
 end
 
 function Base.getindex(blocks::SparseBlocks, i1::UnitRange, i2::UnitRange)
-    block0 = BlockIndices(i1, i2, false)
-    block = getkey(blocks.inds, block0, nothing)
-    if isnothing(block)
-        throw(KeyError((i1, i2)))
-    end
+    block = BlockIndices(i1, i2, false)
+    haskey(blocks.inds, block) || throw(KeyError((i1, i2)))
     SparseBlockIndex(block, blocks.inds[block])
 end
 
@@ -295,4 +292,4 @@ function Broadcast.materialize!(B::SparseBlockView, bc::Broadcast.Broadcasted{<:
             B[r,c] = bc[i]
         end
     end
-end
\ No newline at end of file
+end