diff --git a/src/registry.jl b/src/registry.jl
index e8437e39..49e96d4e 100644
--- a/src/registry.jl
+++ b/src/registry.jl
@@ -282,3 +282,5 @@ add_format(format"RawArray", [0x61,0x72,0x61,0x77,0x72,0x72,0x79,0x61], ".ra", [
 add_format(format"MetaImage", "ObjectType", ".mhd", [:MetaImageFormat])
 
 add_format(format"vegalite", (), [".vegalite"], [:VegaLite])
+
+add_format(format"FCS", "FCS", [".fcs"], [:FCSFiles])
\ No newline at end of file