diff --git a/build.zig b/build.zig
index 3a3e222..a8a5ce6 100644
--- a/build.zig
+++ b/build.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 
-const VERSION = "0.1.0";
+const VERSION = "0.1.1";
 
 // Although this function looks imperative, note that its job is to
 // declaratively construct a build graph that will be executed by an external
diff --git a/ipc.pc b/ipc.pc
index f854ce1..6aaa656 100644
--- a/ipc.pc
+++ b/ipc.pc
@@ -3,6 +3,6 @@ libdir=/usr/local/lib
 
 Name: LibIPC
 Description: The simplest Inter Process Communication library
-Version: 0.1.0
+Version: 0.1.1
 Libs: -L${libdir} -lipc
 Cflags: -I${includedir}
diff --git a/libipc.h b/libipc.h
index bca8c14..2bddef9 100644
--- a/libipc.h
+++ b/libipc.h
@@ -41,8 +41,9 @@ int ipc_close_all (void* ctx);
 int ipc_add_external (void* ctx, int newfd);
 int ipc_add_switch (void* ctx, int fd1, int fd2);
 
+// Returned "char" is a cb_event_types enum.
 int ipc_set_switch_callbacks (void* ctx, int fd
-  , enum cb_event_types (*in (int orig, const char *payload, uint32_t *mlen))
-  , enum cb_event_types (*out(int dest,       char *payload, uint32_t  mlen)));
+  , char (*in (int orig, const char *payload, uint32_t *mlen))
+  , char (*out(int dest,       char *payload, uint32_t  mlen)));
 
 #endif