diff --git a/plugins/feature/rigctlserver/rigctlserverworker.cpp b/plugins/feature/rigctlserver/rigctlserverworker.cpp
index 7cfb52019..ec63caedd 100644
--- a/plugins/feature/rigctlserver/rigctlserverworker.cpp
+++ b/plugins/feature/rigctlserver/rigctlserverworker.cpp
@@ -22,6 +22,8 @@
 #include <QEventLoop>
 #include <QTimer>
 
+#include <cmath>
+
 #include "SWGDeviceState.h"
 #include "SWGSuccessResponse.h"
 #include "SWGErrorResponse.h"