diff --git a/ext/hash/hash.c b/ext/hash/hash.c
index 02c16877db8..b0fe0c03232 100644
--- a/ext/hash/hash.c
+++ b/ext/hash/hash.c
@@ -314,6 +314,11 @@ function_entry hash_functions[] = {
 	PHP_NAMED_FE(md5_file, php_if_md5_file,			NULL)
 #endif /* PHP_HASH_MD5_NOT_IN_CORE */
 
+#ifdef PHP_HASH_SHA1_NOT_IN_CORE
+	PHP_NAMED_FE(sha1, php_if_sha1,					NULL)
+	PHP_NAMED_FE(sha1_file, php_if_sha1_file,		NULL)
+#endif /* PHP_HASH_SHA1_NOT_IN_CORE */
+
 	{NULL, NULL, NULL}
 };
 /* }}} */