diff --git a/rowers/c2stuff.py b/rowers/c2stuff.py
index de95f63f..c055242a 100644
--- a/rowers/c2stuff.py
+++ b/rowers/c2stuff.py
@@ -206,9 +206,16 @@ def summaryfromsplitdata(splitdata,data,filename,sep='|'):
         maxhr = data['heart_rate']['max']
     except KeyError:
         maxhr = 0
-        
-    avgpace = 500.*totaltime/totaldist
-    restpace = 500.*resttime/restdistance
+
+    try:
+        avgpace = 500.*totaltime/totaldist
+    except (ZeroDivisionError,OverflowError):
+        avgpace = 0.
+
+    try:
+        restpace = 500.*resttime/restdistance
+    except (ZeroDivisionError,OverflowError):
+        restpace = 0.
 
     velo = totaldist/totaltime
     avgpower = 2.8*velo**(3.0)