--- django/contrib/gis/geometry/regex.py.orig	2011-09-16 12:26:13.722300861 +0200
+++ django/contrib/gis/geometry/regex.py	2011-09-16 12:17:30.190301868 +0200
@@ -4,7 +4,7 @@
 # to prevent potentially malicious input from reaching the underlying C
 # library.  Not a substitute for good Web security programming practices.
 hex_regex = re.compile(r'^[0-9A-F]+$', re.I)
-wkt_regex = re.compile(r'^(SRID=(?P<srid>\d+);)?'
+wkt_regex = re.compile(r'^(SRID=(?P<srid>\-?\d+);)?'
                        r'(?P<wkt>'
                        r'(?P<type>POINT|LINESTRING|LINEARRING|POLYGON|MULTIPOINT|MULTILINESTRING|MULTIPOLYGON|GEOMETRYCOLLECTION)'
                        r'[ACEGIMLONPSRUTYZ\d,\.\-\(\) ]+)$',
