diff --git a/tools/cabana/dbc/dbc.h b/tools/cabana/dbc/dbc.h
index 701908112f..8b1e5a16e9 100644
--- a/tools/cabana/dbc/dbc.h
+++ b/tools/cabana/dbc/dbc.h
@@ -11,8 +11,8 @@
 const QString UNTITLED = "untitled";
 
 struct MessageId {
-  uint8_t source;
-  uint32_t address;
+  uint8_t source = 0;
+  uint32_t address = 0;
 
   QString toString() const {
     return QString("%1:%2").arg(source).arg(address, 1, 16);