diff --git a/src/DitStr.jl b/src/DitStr.jl
index ded4369..6750788 100644
--- a/src/DitStr.jl
+++ b/src/DitStr.jl
@@ -64,7 +64,7 @@ Base.zero(::Type{DitStr{D,N,T}}) where {D,N,T} = DitStr{D,N,T}(zero(T))
 Base.zero(::DitStr{D,N,T}) where {D,N,T} = DitStr{D,N,T}(zero(T))
 
 buffer(b::DitStr) = b.buf
-Base.hash(d::DitStr) = hash(buffer(d))
+Base.hash(d::DitStr, h::UInt) = hash(buffer(d), h)
 Base.reinterpret(::Type{DitStr{D,N,T}}, x::Integer) where {D,N,T} = DitStr{D,N,T}(reinterpret(T, x))
 Base.reinterpret(::Type{T}, x::DitStr) where {T} = reinterpret(T, buffer(x))
 Base.reinterpret(::Type{DitStr{D,N,T}}, x::DitStr) where {D,N,T} = DitStr{D,N,T}(x)
diff --git a/src/longlonguint.jl b/src/longlonguint.jl
index 14113c6..ad19b2f 100644
--- a/src/longlonguint.jl
+++ b/src/longlonguint.jl
@@ -212,8 +212,8 @@ function longinttype(n::Int, D::Int)
     return LongLongUInt{C}
 end
 
-Base.hash(x::LongLongUInt{1}) = hash(x.content[1])
-Base.hash(x::LongLongUInt{C}) where{C} = hash(x.content)
+Base.hash(x::LongLongUInt{1}, h::UInt) = hash(x.content[1], h)
+Base.hash(x::LongLongUInt{C}, h::UInt) where{C} = hash(x.content, h)
 
 # these APIs will are used in SparseTN
 BitBasis.log2i(x::LongLongUInt{C}) where C = floor(Int, log2(Float64(BigInt(x))))