diff --git a/ext/filter/package.xml b/ext/filter/package.xml
index e8a16905649..9945d39b986 100644
--- a/ext/filter/package.xml
+++ b/ext/filter/package.xml
@@ -28,6 +28,7 @@ of filters and mechanisms that users can use to safely access their input data.
   <date>2006-02-??</date>
   <notes>
 - Fixed PECL bug #6639: uppercase hexadecimal digits are not supported.
+- Implemented PECL req #6641: negative values for hexadecimal and octal numbers are not supported.
   </notes>
   <filelist>
    <file role="src" name="config.m4"/>
diff --git a/ext/filter/tests/013.phpt b/ext/filter/tests/013.phpt
index 10ae9eff291..783df86537e 100644
--- a/ext/filter/tests/013.phpt
+++ b/ext/filter/tests/013.phpt
@@ -10,6 +10,17 @@ var_dump(filter_data("0XFF", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALL
 var_dump(filter_data("07", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_OCTAL)));
 var_dump(filter_data("0xff0000", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX)));
 var_dump(filter_data("0666", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_OCTAL)));
+var_dump(filter_data("08", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_OCTAL)));
+var_dump(filter_data("00", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_OCTAL)));
+var_dump(filter_data("000", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_OCTAL)));
+
+var_dump(filter_data("-0xff", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX)));
+var_dump(filter_data("-0Xff", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX)));
+var_dump(filter_data("-0xFF", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX)));
+var_dump(filter_data("-0XFF", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX)));
+var_dump(filter_data("-07", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_OCTAL)));
+var_dump(filter_data("-0xff0000", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX)));
+var_dump(filter_data("-0666", FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_OCTAL)));
 
 var_dump(filter_data("6", FILTER_VALIDATE_INT, array("min_range"=>1, "max_range"=>7)));
 var_dump(filter_data("6", FILTER_VALIDATE_INT, array("min_range"=>0, "max_range"=>5)));
@@ -33,6 +44,16 @@ int(255)
 int(7)
 int(16711680)
 int(438)
+NULL
+int(0)
+int(0)
+int(-255)
+int(-255)
+int(-255)
+int(-255)
+int(-7)
+int(-16711680)
+int(-438)
 int(6)
 NULL
 NULL