diff --git a/communication/message/flexray/control/flexraycontrolmessage.cpp b/communication/message/flexray/control/flexraycontrolmessage.cpp
index 0ad4f49..255205f 100644
--- a/communication/message/flexray/control/flexraycontrolmessage.cpp
+++ b/communication/message/flexray/control/flexraycontrolmessage.cpp
@@ -59,7 +59,7 @@ std::vector<uint8_t> FlexRayControlMessage::BuildWriteMessageBufferArgs(
 		uint8_t(desiredSize / 4)
 	};
 	args.insert(args.end(), data.begin(), data.end());
-	if(args.size() != desiredSize + 2)
+	if((int)args.size() != desiredSize + 2)
 		args.resize(desiredSize + 2);
 	return BuildBaseControlArgs(controller, FlexRay::Opcode::WriteMessageBuffer, args);
 }
diff --git a/device/extensions/flexray/controller.cpp b/device/extensions/flexray/controller.cpp
index 308a981..e87b903 100644
--- a/device/extensions/flexray/controller.cpp
+++ b/device/extensions/flexray/controller.cpp
@@ -281,7 +281,7 @@ bool FlexRay::Controller::configure(std::chrono::milliseconds timeout) {
 
 	uint16_t dataPointer = (totalBuffers + 1) * 4;
 	for(auto i = 0; i < totalBuffers; i++) {
-		MessageBuffer& buf = *(i < staticTx.size() ? staticTx[i] : dynamicTx[i - staticTx.size()]);
+		MessageBuffer& buf = *(i < (int)staticTx.size() ? staticTx[i] : dynamicTx[i - staticTx.size()]);
 
 		if(buf.frameID == 0)
 			buf.frameID = i | (1 << 10);