diff --git a/dstat_interface/interface/adc_pot.py b/dstat_interface/interface/adc_pot.py
index 28619d1e95de2f54d22f7a7c6b8941e68681d73f..1b236e12104f6531169d62d7ba34c0c8bdb42de6 100755
--- a/dstat_interface/interface/adc_pot.py
+++ b/dstat_interface/interface/adc_pot.py
@@ -29,23 +29,23 @@ except ImportError:
 from errors import InputError, VarError, ErrorLogger
 _logger = ErrorLogger(sender="dstat_adc_pot")
 
-v1_1_gain = [(0, "100 Ω (15 mA FS)", 0),
-             (1, "300 Ω (5 mA FS)", 1),
-             (2, "3 kΩ (500 µA FS)", 2),
-             (3, "30 kΩ (50 µA FS)", 3),
-             (4, "300 kΩ (5 µA FS)", 4),
-             (5, "3 MΩ (500 nA FS)", 5),
-             (6, "30 MΩ (50 nA FS)", 6),
-             (7, "500 MΩ (3 nA FS)", 7)]
+v1_1_gain = [(0, "100 Ω (15 mA FS)", "0"),
+             (1, "300 Ω (5 mA FS)", "1"),
+             (2, "3 kΩ (500 µA FS)", "2"),
+             (3, "30 kΩ (50 µA FS)", "3"),
+             (4, "300 kΩ (5 µA FS)", "4"),
+             (5, "3 MΩ (500 nA FS)", "5"),
+             (6, "30 MΩ (50 nA FS)", "6"),
+             (7, "500 MΩ (3 nA FS)", "7")]
 
-v1_2_gain = [(0, "Bypass", 0),
-             (1, "100 Ω (15 mA FS)", 1),
-             (2, "3 kΩ (500 µA FS)", 2),
-             (3, "30 kΩ (50 µA FS)", 3),
-             (4, "300 kΩ (5 µA FS)", 4),
-             (5, "3 MΩ (500 nA FS)", 5),
-             (6, "30 MΩ (50 nA FS)", 6),
-             (7, "100 MΩ (15 nA FS)", 7)]
+v1_2_gain = [(0, "Bypass", "0"),
+             (1, "100 Ω (15 mA FS)", "1"),
+             (2, "3 kΩ (500 µA FS)", "2"),
+             (3, "30 kΩ (50 µA FS)", "3"),
+             (4, "300 kΩ (5 µA FS)", "4"),
+             (5, "3 MΩ (500 nA FS)", "5"),
+             (6, "30 MΩ (50 nA FS)", "6"),
+             (7, "100 MΩ (15 nA FS)", "7")]
              
 
 class adc_pot(object):
@@ -142,7 +142,7 @@ class adc_pot(object):
         if version[0] == 1:
             if version[1] == 1:
                 for i in v1_1_gain:
-                    self.gain_liststore.append(i)
+                    self.gain_liststore.append(str(i))
             elif version[1] >= 2:
                 for i in v1_2_gain:
                     self.gain_liststore.append(i)