diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 92d7a0f..cc0f791 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -5841,7 +5841,8 @@
 mouse_pterm		Compiled with support for qnx pterm mouse.
 mouse_sysmouse		Compiled with support for sysmouse (*BSD console mouse)
 mouse_xterm		Compiled with support for xterm mouse.
-multi_byte		Compiled with support for editing Korean et al.
+multi_byte		Compiled with support for 'encoding'
+multi_byte_encoding	'encoding' is set to a multi-byte encoding.
 multi_byte_ime		Compiled with support for IME input method.
 multi_lang		Compiled with support for multiple languages.
 mzscheme		Compiled with MzScheme interface |mzscheme|.
diff --git a/src/eval.c b/src/eval.c
index 75c4099..a242ebf 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -11842,6 +11842,10 @@
 	    n = has_patch(atoi((char *)name + 5));
 	else if (STRICMP(name, "vim_starting") == 0)
 	    n = (starting != 0);
+#ifdef FEAT_MBYTE
+	else if (STRICMP(name, "multi_byte_encoding") == 0)
+	    n = has_mbyte;
+#endif
 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
 	else if (STRICMP(name, "balloon_multiline") == 0)
 	    n = multiline_balloon_available();
diff --git a/src/version.c b/src/version.c
index 000aa18..10b42d1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -677,6 +677,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    66,
+/**/
     65,
 /**/
     64,