diff --git a/src/registry.jl b/src/registry.jl
index 281229d0..77f01613 100644
--- a/src/registry.jl
+++ b/src/registry.jl
@@ -6,6 +6,7 @@ add_format(format"JLD", (unsafe_wrap(Vector{UInt8}, "Julia data file (HDF5), ver
 add_format(format"JLD2", "Julia data file (HDF5), version 0.2", ".jld2", [:JLD2])
 add_format(format"GZIP", [0x1f, 0x8b], ".gz", [:Libz])
 add_format(format"BSON",(),".bson", [:BSON])
+add_format(format"JLSO", (), ".jlso", [:JLSO])
 
 # test for RD?n magic sequence at the beginning of R data input stream
 function detect_rdata(io)