diff --git a/script/CoverDetection.py b/script/CoverDetection.py
index f9ba4fa..3d13451 100644
--- a/script/CoverDetection.py
+++ b/script/CoverDetection.py
@@ -69,7 +69,7 @@ for i in xdata:
     
     #renderer = show_panel(op.bufferedImage)
     #time.sleep(0.001)
-p = plot(ydata)[0]
+p = plot(ydata,xdata=xdata)[0]
 
 
 peaks = estimate_peak_indexes(ydata, xdata,  (min(ydata) + max(ydata))/2,  25.0)
@@ -78,4 +78,5 @@ print "Peak values:  " + str(map(lambda x:ydata[x], peaks))
 
 
 for i in range(len(peaks)):
-    p.addMarker(peaks[i], None, "N="+str(round(peaks[i],2)), Color(80,0,80))
\ No newline at end of file
+    peak = xdata[peaks[i]]
+    p.addMarker(peak, None, "N="+str(round(peak,2)), Color(80,0,80))
\ No newline at end of file