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-rw-r--r--wcsmbs/wchar.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/wcsmbs/wchar.h b/wcsmbs/wchar.h
index b7b63baadc..e8aae7ad7b 100644
--- a/wcsmbs/wchar.h
+++ b/wcsmbs/wchar.h
@@ -266,7 +266,7 @@ extern int wctob (wint_t __c) __THROW;
 
 /* Determine whether PS points to an object representing the initial
    state.  */
-extern int mbsinit (__const mbstate_t *__ps) __THROW;
+extern int mbsinit (__const mbstate_t *__ps) __THROW __attribute_pure__;
 
 /* Write wide character representation of multibyte character pointed
    to by S to PWC.  */