diff --git a/src/NMEACommand.cpp b/src/NMEACommand.cpp
index 0319f99..e03123c 100644
--- a/src/NMEACommand.cpp
+++ b/src/NMEACommand.cpp
@@ -15,7 +15,9 @@ using namespace std;
 using namespace nmea;
 
 
-NMEACommand::NMEACommand(){};
+NMEACommand::NMEACommand()
+	: checksum(0)
+{};
 
 NMEACommand::~NMEACommand(){};