diff --git a/src/graph.jl b/src/graph.jl
index 39df611c..94954602 100644
--- a/src/graph.jl
+++ b/src/graph.jl
@@ -23,7 +23,7 @@ end
 
 SparsityPatternCSC(A::SparseMatrixCSC) = SparsityPatternCSC(A.m, A.n, A.colptr, A.rowval)
 
-Base.eltype(::SparsityPatternCSC{T}) where {T} = T
+SparseArrays.indtype(::SparsityPatternCSC{T}) where {T} = T
 Base.size(S::SparsityPatternCSC) = (S.m, S.n)
 Base.size(S::SparsityPatternCSC, d::Integer) = d::Integer <= 2 ? size(S)[d] : 1
 Base.axes(S::SparsityPatternCSC, d::Integer) = Base.OneTo(size(S, d))
diff --git a/test/graph.jl b/test/graph.jl
index e9784e56..773a0206 100644
--- a/test/graph.jl
+++ b/test/graph.jl
@@ -15,7 +15,8 @@ using Test
 ## SparsityPatternCSC
 
 @testset "SparsityPatternCSC" begin
-    @test eltype(SparsityPatternCSC(sprand(10, 10, 0.1))) == Int
+    @test eltype(SparsityPatternCSC(sprand(10, 10, 0.1))) == Bool
+    @test SparseArrays.indtype(SparsityPatternCSC(sprand(10, 10, 0.1))) == Int
     @testset "Transpose" begin
         for _ in 1:1000
             m, n = rand(100:1000), rand(100:1000)