diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index 9c8662a051dc..6abb7a8f059c 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -294,6 +294,7 @@ extern const struct comedi_lrange range_bipolar5;
 extern const struct comedi_lrange range_bipolar2_5;
 extern const struct comedi_lrange range_unipolar10;
 extern const struct comedi_lrange range_unipolar5;
+extern const struct comedi_lrange range_unipolar2_5;
 extern const struct comedi_lrange range_unknown;
 
 #define range_digital		range_unipolar5
diff --git a/drivers/staging/comedi/range.c b/drivers/staging/comedi/range.c
index 59ff0cf73381..efec9022a7ae 100644
--- a/drivers/staging/comedi/range.c
+++ b/drivers/staging/comedi/range.c
@@ -35,6 +35,8 @@ const struct comedi_lrange range_unipolar10 = { 1, {UNI_RANGE(10)} };
 EXPORT_SYMBOL(range_unipolar10);
 const struct comedi_lrange range_unipolar5 = { 1, {UNI_RANGE(5)} };
 EXPORT_SYMBOL(range_unipolar5);
+const struct comedi_lrange range_unipolar2_5 = { 1, {UNI_RANGE(2.5)} };
+EXPORT_SYMBOL(range_unipolar2_5);
 const struct comedi_lrange range_unknown = { 1, {{0, 1000000, UNIT_none} } };
 EXPORT_SYMBOL(range_unknown);