diff --git a/src/AbstractIndices.jl b/src/AbstractIndices.jl
index 08db8e6..27f5236 100644
--- a/src/AbstractIndices.jl
+++ b/src/AbstractIndices.jl
@@ -63,7 +63,7 @@ function Base.in(i, indices::AbstractIndices{I}) where I
 end
 
 # Match the default setting from Base - the majority of containers will know their size
-Base.IteratorSize(indices::AbstractIndices) = Base.HasLength() 
+Base.IteratorSize(::AbstractIndices) = Base.HasLength() 
 
 function Base.length(indices::AbstractIndices)
     if Base.IteratorSize(indices) isa Base.SizeUnknown
diff --git a/src/Indices.jl b/src/Indices.jl
index 6ae91ae..0025b5f 100644
--- a/src/Indices.jl
+++ b/src/Indices.jl
@@ -26,7 +26,13 @@ Indices{I}(iter) where {I} = Indices{I, typeof(iter)}(iter) # There is a corner
 end
 
 Base.in(i::I, inds::Indices{I}) where {I} = in(i, inds.inds)
-Base.IteratorSize(i::Indices) = Base.IteratorSize(i.inds)
+function Base.IteratorSize(i::Indices)
+    out = Base.IteratorSize(i.inds)
+    if out isa Base.HasShape
+        return Base.HasLength()
+    end
+    return out
+end
 Base.length(i::Indices) = length(i.inds)
 
 # Specialize for `Vector` elements. Satisfy the tokenization and insertion interface