diff --git a/xgm.py b/xgm.py
index 053d758a9be80df5399af8bada2d62405b394e27..9b62b14a332b21be5e3a4daf3388657f7c0fd935 100644
--- a/xgm.py
+++ b/xgm.py
@@ -847,6 +847,7 @@ def matchXgmTimPulseId(data, use_apd=True, intstart=None, intstop=None,
                 dropList.append('MCP{}apd'.format(mcp))
     mergeList.append(data.drop(dropList))
     subset = xr.merge(mergeList, join='inner')
+    subset.attrs['run'] = data.attrs['run']
     return subset
 
 # Fast ADC
@@ -932,6 +933,7 @@ def mergeFastAdcPeaks(data, channel, intstart, intstop, bkgstart, bkgstop,
         s = data
     peaks = peaks.rename(key).rename({'peakId':dim})
     subset = xr.merge([s, peaks], join='inner')
+    subset.attrs['run'] = data.attrs['run']
     return subset