diff --git a/tools/cabana/messageswidget.cc b/tools/cabana/messageswidget.cc
index 657743901e..e24e8ab291 100644
--- a/tools/cabana/messageswidget.cc
+++ b/tools/cabana/messageswidget.cc
@@ -254,9 +254,13 @@ static bool parseRange(const QString &filter, uint32_t value, int base = 10) {
   unsigned int min = std::numeric_limits<unsigned int>::min();
   unsigned int max = std::numeric_limits<unsigned int>::max();
   auto s = filter.split('-');
-  bool ok = s.size() <= 2;
+  bool ok = s.size() >= 1 && s.size() <= 2;
   if (ok && !s[0].isEmpty()) min = s[0].toUInt(&ok, base);
-  if (ok && s.size() == 2 && !s[1].isEmpty()) max = s[1].toUInt(&ok, base);
+  if (ok && s.size() == 1) {
+    max = min;
+  } else if (ok && s.size() == 2 && !s[1].isEmpty()) {
+    max = s[1].toUInt(&ok, base);
+  }
   return ok && value >= min && value <= max;
 }