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-rw-r--r--ext/openssl/ossl.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/openssl/ossl.h b/ext/openssl/ossl.h
index 577eb6d6be..07d789e0f8 100644
--- a/ext/openssl/ossl.h
+++ b/ext/openssl/ossl.h
@@ -120,7 +120,7 @@ int ossl_pem_passwd_cb(char *, int, int, void *);
/*
* ERRor messages
*/
-NORETURN(void ossl_raise(VALUE, const char *, ...));
+PRINTF_ARGS(NORETURN(void ossl_raise(VALUE, const char *, ...)), 2, 3);
/* Clear OpenSSL error queue. If dOSSL is set, rb_warn() them. */
void ossl_clear_error(void);