diff --git a/django/contrib/gis/forms/fields.py b/django/contrib/gis/forms/fields.py
index 59e7259..00d66a9 100644
a
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b
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class GeometryField(forms.Field):
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92 | 92 | |
93 | 93 | # Only do a geographic comparison if both values are available |
94 | 94 | if initial and data: |
95 | | data = fromstr(data) |
| 95 | data = fromstr(data, srid=self.widget.map_srid) |
96 | 96 | data.transform(initial.srid) |
97 | 97 | # If the initial value was not added by the browser, the geometry |
98 | 98 | # provided may be slightly different, the first time it is saved. |