diff --git a/oscar/statistics.cpp b/oscar/statistics.cpp
index 8a475d77..e38a3b3f 100644
--- a/oscar/statistics.cpp
+++ b/oscar/statistics.cpp
@@ -182,6 +182,11 @@ void Statistics::updateRXChanges()
         if (mach == nullptr)
             continue;
 
+        if (day->first() == 0) {  // Ignore invalid dates
+            qDebug() << "Statistics::updateRXChanges ignoring day with first=0";
+            continue;
+        }
+
         bool fnd = false;