diff --git a/NEWS b/NEWS
index 40fc8e861ac..d14b616a64c 100644
--- a/NEWS
+++ b/NEWS
@@ -8,10 +8,6 @@ PHP                                                                        NEWS
 - ODBC:
   . Fixed bug #73725 (Unable to retrieve value of varchar(max) type). (Anatol)
 
-- SPL:
-  . Fixed bug #75878 (RecursiveTreeIterator::setPostfix has wrong signature).
-    (cmb)
-
 01 Feb 2018, PHP 7.1.14
 
 - Core:
diff --git a/ext/spl/spl_iterators.c b/ext/spl/spl_iterators.c
index 1b38cc0ff27..db6896965ad 100644
--- a/ext/spl/spl_iterators.c
+++ b/ext/spl/spl_iterators.c
@@ -1328,10 +1328,6 @@ ZEND_BEGIN_ARG_INFO_EX(arginfo_recursive_tree_it_setPrefixPart, 0, 0, 2)
 	ZEND_ARG_INFO(0, value)
 ZEND_END_ARG_INFO();
 
-ZEND_BEGIN_ARG_INFO_EX(arginfo_recursive_tree_it_setPostfix, 0, 0, 1)
-	ZEND_ARG_INFO(0, postfix)
-ZEND_END_ARG_INFO();
-
 static const zend_function_entry spl_funcs_RecursiveTreeIterator[] = {
 	SPL_ME(RecursiveTreeIterator,     __construct,       arginfo_recursive_tree_it___construct,   ZEND_ACC_PUBLIC)
 	SPL_ME(RecursiveIteratorIterator, rewind,            arginfo_recursive_it_void,               ZEND_ACC_PUBLIC)
@@ -1349,7 +1345,7 @@ static const zend_function_entry spl_funcs_RecursiveTreeIterator[] = {
 	SPL_ME(RecursiveTreeIterator,     getPrefix,         arginfo_recursive_it_void,               ZEND_ACC_PUBLIC)
 	SPL_ME(RecursiveTreeIterator,     setPrefixPart,     arginfo_recursive_tree_it_setPrefixPart, ZEND_ACC_PUBLIC)
 	SPL_ME(RecursiveTreeIterator,     getEntry,          arginfo_recursive_it_void,               ZEND_ACC_PUBLIC)
-	SPL_ME(RecursiveTreeIterator,     setPostfix,        arginfo_recursive_tree_it_setPostfix,               ZEND_ACC_PUBLIC)
+	SPL_ME(RecursiveTreeIterator,     setPostfix,        arginfo_recursive_it_void,               ZEND_ACC_PUBLIC)
 	SPL_ME(RecursiveTreeIterator,     getPostfix,        arginfo_recursive_it_void,               ZEND_ACC_PUBLIC)
 	PHP_FE_END
 };