diff --git a/src/code/fd-stream-comp.lisp b/src/code/fd-stream-comp.lisp
index e05dc1a5c848ce5704b9eaa4ebcc3cb1e4e8898c..af58c80bb2bce1c8d135999f690db14a6cf07db4 100644
--- a/src/code/fd-stream-comp.lisp
+++ b/src/code/fd-stream-comp.lisp
@@ -26,6 +26,7 @@
 (stream::precompile-ef-slot :iso8859-1 #.stream::+ef-so+)
 (stream::precompile-ef-slot :iso8859-1 #.stream::+ef-en+)
 (stream::precompile-ef-slot :iso8859-1 #.stream::+ef-de+)
+(stream::precompile-ef-slot :iso8859-1 #.stream::+ef-osc+)
 
 (stream::precompile-ef-slot :utf-8 #.stream::+ef-cin+)
 (stream::precompile-ef-slot :utf-8 #.stream::+ef-cout+)
@@ -34,4 +35,4 @@
 (stream::precompile-ef-slot :utf-8 #.stream::+ef-so+)
 (stream::precompile-ef-slot :utf-8 #.stream::+ef-en+)
 (stream::precompile-ef-slot :utf-8 #.stream::+ef-de+)
-
+(stream::precompile-ef-slot :utf-8 #.stream::+ef-osc+)