diff --git a/Makefile b/Makefile
index b00c76d8..a3ded520 100644
--- a/Makefile
+++ b/Makefile
@@ -70,8 +70,6 @@ QTESTABLE=$(filter-out $(DONTTEST), \
 	$(wildcard src/data/*.mli) \
 	$(wildcard src/string/*.ml) \
 	$(wildcard src/string/*.mli) \
-	$(wildcard src/io/*.ml) \
-	$(wildcard src/io/*.mli) \
 	$(wildcard src/unix/*.ml) \
 	$(wildcard src/unix/*.mli) \
 	$(wildcard src/sexp/*.ml) \
diff --git a/README.adoc b/README.adoc
index 17803a30..e5bbfdca 100644
--- a/README.adoc
+++ b/README.adoc
@@ -21,7 +21,6 @@ cross-module dependencies).
 
   containers.data:: with additional data structures that don't have an
     equivalent in the standard library;
-  containers.io:: (deprecated)
   containers.iter:: with list-like and tree-like iterators;
   containers.string:: (in directory `string`) with
     a few packed modules that deal with strings (Levenshtein distance,
diff --git a/_oasis b/_oasis
index feddb2c9..2839b24e 100644
--- a/_oasis
+++ b/_oasis
@@ -49,13 +49,6 @@ Library "containers"
   BuildDepends:     bytes, result
   # BuildDepends:     bytes, bisect_ppx
 
-Library "containers_io"
-  Path:             src/io
-  Modules:          Containers_io_is_deprecated
-  BuildDepends:     bytes
-  FindlibParent:    containers
-  FindlibName:      io
-
 Library "containers_unix"
   Path:             src/unix
   Modules:          CCUnix
@@ -137,7 +130,7 @@ Document containers
   XOCamlbuildLibraries:
     containers, containers.iter, containers.data,
     containers.string, containers.thread,
-    containers.advanced, containers.io, containers.unix, containers.sexp
+    containers.advanced, containers.unix, containers.sexp
 
 Executable run_benchs
   Path:             benchs/
@@ -166,7 +159,7 @@ Executable run_qtest
   MainIs:           run_qtest.ml
   Build$:           flag(tests) && flag(bigarray) && flag(unix) && flag(advanced)
   BuildDepends:     containers, containers.string, containers.iter,
-                    containers.io, containers.advanced, containers.sexp,
+                    containers.advanced, containers.sexp,
                     containers.unix, containers.thread,
                     containers.data,
                     sequence, gen, unix, oUnit, qcheck
diff --git a/doc/intro.txt b/doc/intro.txt
index e4f31948..8384761a 100644
--- a/doc/intro.txt
+++ b/doc/intro.txt
@@ -96,10 +96,6 @@ CCTrie
 CCWBTree
 }
 
-{4 Containers.io}
-
-{b deprecated} use {!CCIO} directly from the set of core modules.
-
 {4 Containers.unix}
 
 Helpers that depend on {!Unix}, e.g. to spawn sub-processes.