diff --git a/base/show.jl b/base/show.jl
index e34a9290fbf7f..d94e4f17825db 100644
--- a/base/show.jl
+++ b/base/show.jl
@@ -1835,11 +1835,11 @@ end
 
 ## `summary` for AbstractArrays
 # sizes such as 0-dimensional, 4-dimensional, 2x3
-dims2string(d::Dims) = isempty(d) ? "0-dimensional" :
-                       length(d) == 1 ? "$(d[1])-element" :
-                       join(map(string,d), '×')
+dims2string(d) = isempty(d) ? "0-dimensional" :
+                 length(d) == 1 ? "$(d[1])-element" :
+                 join(map(string,d), '×')
 
-inds2string(inds::Indices) = join(map(string,inds), '×')
+inds2string(inds) = join(map(string,inds), '×')
 
 # anything array-like gets summarized e.g. 10-element Array{Int64,1}
 summary(io::IO, a::AbstractArray) = summary(io, a, axes(a))
diff --git a/test/show.jl b/test/show.jl
index d849901deade5..546c1eb94fdb6 100644
--- a/test/show.jl
+++ b/test/show.jl
@@ -1189,3 +1189,10 @@ end
     @test repr("text/plain", context=:compact=>true) == "\"text/plain\""
     @test repr(MIME("text/plain"), context=:compact=>true) == "MIME type text/plain"
 end
+
+@testset "#26799 BigInt summary" begin
+    @test Base.dims2string(tuple(BigInt(10))) == "10-element"
+    @test Base.inds2string(tuple(BigInt(10))) == "10"
+    @test summary(BigInt(1):BigInt(10)) == "10-element UnitRange{BigInt}"
+    @test summary(Base.OneTo(BigInt(10))) == "10-element Base.OneTo{BigInt}"
+end