diff --git a/src/AutoPilotPlugins/PX4/PX4ParameterLoader.cc b/src/AutoPilotPlugins/PX4/PX4ParameterLoader.cc
index 13bae0925cdd8832e8ae6620833c5b1d73c0faad..4be3a4e21b32b10d629eb396ef6f6e66c693fa87 100644
--- a/src/AutoPilotPlugins/PX4/PX4ParameterLoader.cc
+++ b/src/AutoPilotPlugins/PX4/PX4ParameterLoader.cc
@@ -53,7 +53,7 @@ QVariant PX4ParameterLoader::_stringToTypedVariant(const QString& string, FactMe
 {
     QVariant var(string);
 
-    int convertTo;
+    int convertTo = QVariant::Int; // keep compiler warning happy
     switch (type) {
         case FactMetaData::valueTypeUint8:
         case FactMetaData::valueTypeUint16: