diff --git a/src/main/python/plot_graphutils.py b/src/main/python/plot_graphutils.py
index e59e21f..985d625 100644
--- a/src/main/python/plot_graphutils.py
+++ b/src/main/python/plot_graphutils.py
@@ -39,11 +39,11 @@ def legend_box_contents(name, y):
 
 def general_background_setup(tup,ymin,ymax,x):
 
-    unix_x = list(map(plot_timeutils.unix,x))
+    unix_x = [ el.timestamp() for el in x ]
 
     ### SET AXIS LIMITS ###
-    tup[AXIS].set_ylim([ymin,ymax])
-    tup[AXIS].set_xlim([plot_timeutils.unix(min(x)),plot_timeutils.unix(max(x))])
+    tup[AXIS].set_ylim( [ ymin, ymax ] )
+    tup[AXIS].set_xlim( [ min(x).timestamp(), max(x).timestamp() ] )
 
     if CFG("draw_thresholds"):
         hcrit=CFG("humidity_critical")
@@ -223,7 +223,7 @@ def gen_xticks_from_timeseries(x):
         xticks = []
         xmax += step*CFG("add_x_labels_at_end")
         while cur < xmax:
-            xticks += [plot_timeutils.unix(cur)]
+            xticks += [cur.timestamp()]
             cur+=step
         return xticks
 
diff --git a/src/main/python/plot_main.py b/src/main/python/plot_main.py
index d6aded6..4d5cb2f 100644
--- a/src/main/python/plot_main.py
+++ b/src/main/python/plot_main.py
@@ -44,7 +44,7 @@ def __plot(tup, datapoints, path, date1=None, date2=None, forcePath=False):
                     continue
                 else:
                     NO_SERIES = False
-                    unix_x = list(map(plot_timeutils.unix,x))
+                    unix_x = [ el.timestamp() for el in x]
                     ymin,ymax = plot_graphutils.getlimits_y(y)
 
                 #### GET LINE STYLES ####
diff --git a/src/main/python/plot_timeutils.py b/src/main/python/plot_timeutils.py
index 812f70b..14ad181 100644
--- a/src/main/python/plot_timeutils.py
+++ b/src/main/python/plot_timeutils.py
@@ -18,9 +18,6 @@ def time_from_dbf(l, timeformat):
 def time_from_csv(l, timeformat):
         return datetime.strptime(l, timeformat)
 
-def unix(dt):
-    return dt.timestamp()
-
 def round_time_to_step(start,step):
         start  += step / 2
         discard = timedelta(days=0)