diff --git a/dictionaries/CallMap.php b/dictionaries/CallMap.php
index 361f361a5af..5555d97125f 100644
--- a/dictionaries/CallMap.php
+++ b/dictionaries/CallMap.php
@@ -9025,8 +9025,7 @@
 'nsapi_response_headers' => ['array'],
 'nsapi_virtual' => ['bool', 'uri'=>'string'],
 'nthmac' => ['string', 'clent'=>'string', 'data'=>'string'],
-'number_format' => ['string', 'num'=>'float|int', 'decimals='=>'int'],
-'number_format\'1' => ['string', 'num'=>'float|int', 'decimals'=>'int', 'decimal_separator'=>'string', 'thousands_separator'=>'string'],
+'number_format' => ['string', 'num'=>'float|int', 'decimals='=>'int', 'decimal_separator='=>'string', 'thousands_separator='=>'string'],
 'NumberFormatter::__construct' => ['void', 'locale'=>'string', 'style'=>'int', 'pattern='=>'string'],
 'NumberFormatter::create' => ['NumberFormatter|false', 'locale'=>'string', 'style'=>'int', 'pattern='=>'string'],
 'NumberFormatter::format' => ['string|false', 'num'=>'', 'type='=>'int'],
diff --git a/dictionaries/CallMap_80_delta.php b/dictionaries/CallMap_80_delta.php
index 9402f8b84a2..f43f7fc398e 100644
--- a/dictionaries/CallMap_80_delta.php
+++ b/dictionaries/CallMap_80_delta.php
@@ -949,6 +949,10 @@
       'old' => ['bool', 'mysql'=>'mysqli', 'flags='=>'int', 'name='=>'string'],
       'new' => ['bool', 'mysql'=>'mysqli', 'flags='=>'int', 'name='=>'?string'],
     ],
+    'number_format' => [
+      'old' => ['string', 'num'=>'float|int', 'decimals='=>'int'],
+      'new' => ['string', 'num'=>'float|int', 'decimals='=>'int', 'decimal_separator='=>'string', 'thousands_separator='=>'string'],
+    ],
     'openssl_csr_export' => [
       'old' => ['bool', 'csr'=>'string|resource', '&w_output'=>'string', 'no_text='=>'bool'],
       'new' => ['bool', 'csr'=>'OpenSSLCertificateSigningRequest|string', '&w_output'=>'OpenSSLAsymmetricKey', 'no_text='=>'bool'],
@@ -1591,6 +1595,7 @@
     'image2wbmp' => ['bool', 'im'=>'resource', 'filename='=>'?string', 'threshold='=>'int'],
     'jpeg2wbmp' => ['bool', 'jpegname'=>'string', 'wbmpname'=>'string', 'dest_height'=>'int', 'dest_width'=>'int', 'threshold'=>'int'],
     'ldap_sort' => ['bool', 'link_identifier'=>'resource', 'result_identifier'=>'resource', 'sortfilter'=>'string'],
+    'number_format\'1' => ['string', 'num'=>'float|int', 'decimals'=>'int', 'decimal_separator'=>'string', 'thousands_separator'=>'string'],
     'png2wbmp' => ['bool', 'pngname'=>'string', 'wbmpname'=>'string', 'dest_height'=>'int', 'dest_width'=>'int', 'threshold'=>'int'],
     'read_exif_data' => ['array', 'filename'=>'string', 'sections_needed='=>'string', 'sub_arrays='=>'bool', 'read_thumbnail='=>'bool'],
     'SimpleXMLIterator::rewind' => ['void'],
diff --git a/tests/FunctionCallTest.php b/tests/FunctionCallTest.php
index e13296489bd..78f2eef64bb 100644
--- a/tests/FunctionCallTest.php
+++ b/tests/FunctionCallTest.php
@@ -1763,6 +1763,14 @@ function sayHello(string $needle): void {
                 [],
                 '8.1',
             ],
+            'number_formatNamedArgument' => [
+                '<?php
+                    echo number_format(10.363, 1, thousands_separator: " ");
+                ',
+                [],
+                [],
+                '8.0',
+            ],
         ];
     }