diff --git a/sh.set.c b/sh.set.c
index ac73af9..394af71 100644
--- a/sh.set.c
+++ b/sh.set.c
@@ -1334,7 +1334,7 @@ autoset_kanji(void)
 	return;
     }
 
-    if (strcasestr(codeset, "SHIFT_JIS") == (char*)0) {
+    if (strcasecmp(codeset, "SHIFT_JIS") == (char*)0) {
 	if (adrof(STRnokanji) == NULL)
 	    setNS(STRnokanji);
 	return;