diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 89fa1c27013..ba8f337a83c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2010-03-05  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* python/py-lazy-string.c (gdbpy_extract_lazy_string): Extract
+	address as UnsignedLongLong, not LongLong.
+
 2010-03-04  Tom Tromey  <tromey@redhat.com>
 
 	* dwarf2read.c (skip_one_die) <DW_FORM_ref_addr>: Use offset size
diff --git a/gdb/python/py-lazy-string.c b/gdb/python/py-lazy-string.c
index c8452735bb6..8309527527d 100644
--- a/gdb/python/py-lazy-string.c
+++ b/gdb/python/py-lazy-string.c
@@ -187,7 +187,7 @@ gdbpy_extract_lazy_string (PyObject *string, struct type **str_type,
     goto error;
 
   *length = PyLong_AsLong (py_len);
-  addr = PyLong_AsLongLong (py_addr);
+  addr = PyLong_AsUnsignedLongLong (py_addr);
 
   /* If the user supplies Py_None an encoding, set encoding to NULL.
      This will trigger the resulting LA_PRINT_CALL to automatically