diff --git a/ext/filter/filter.c b/ext/filter/filter.c
index da951feb042dd..12aebcf366f80 100644
--- a/ext/filter/filter.c
+++ b/ext/filter/filter.c
@@ -243,7 +243,7 @@ PHP_MINIT_FUNCTION(filter)
 	REGISTER_LONG_CONSTANT("FILTER_SANITIZE_STRIPPED", FILTER_SANITIZE_STRING, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("FILTER_SANITIZE_ENCODED", FILTER_SANITIZE_ENCODED, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("FILTER_SANITIZE_SPECIAL_CHARS", FILTER_SANITIZE_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
-	REGISTER_LONG_CONSTANT("FILTER_SANITIZE_FULL_SPECIAL_CHARS", FILTER_SANITIZE_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("FILTER_SANITIZE_FULL_SPECIAL_CHARS", FILTER_SANITIZE_FULL_SPECIAL_CHARS, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("FILTER_SANITIZE_EMAIL", FILTER_SANITIZE_EMAIL, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("FILTER_SANITIZE_URL", FILTER_SANITIZE_URL, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("FILTER_SANITIZE_NUMBER_INT", FILTER_SANITIZE_NUMBER_INT, CONST_CS | CONST_PERSISTENT);