diff --git a/src/coverlet.core/CoverageSummary.cs b/src/coverlet.core/CoverageSummary.cs
index 1f56e6405..61414b3db 100644
--- a/src/coverlet.core/CoverageSummary.cs
+++ b/src/coverlet.core/CoverageSummary.cs
@@ -32,7 +32,7 @@ public CoverageSummaryResult CalculateSummary()
                     }
                 }
 
-                result.Add(System.IO.Path.GetFileNameWithoutExtension(mod.Key), (linesCovered * 100) / totalLines);
+                result.Add(System.IO.Path.GetFileNameWithoutExtension(mod.Key), totalLines == 0 ? totalLines : (linesCovered * 100) / totalLines);
             }
 
             return result;