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();