diff --git a/src/AllPlot.cpp b/src/AllPlot.cpp
index 65209b759..6c2dd5186 100644
--- a/src/AllPlot.cpp
+++ b/src/AllPlot.cpp
@@ -495,7 +495,7 @@ AllPlot::setData(RideItem *_rideItem)
     if (ride) {
 	setTitle(ride->startTime().toString(GC_DATETIME_FORMAT));
 
-	RideFileDataPresent *dataPresent = ride->areDataPresent();
+	const RideFileDataPresent *dataPresent = ride->areDataPresent();
 	int npoints = ride->dataPoints().size();
 	wattsArray.resize(dataPresent->watts ? npoints : 0);
 	hrArray.resize(dataPresent->hr ? npoints : 0);
diff --git a/src/AllPlotWindow.cpp b/src/AllPlotWindow.cpp
index fa7278f89..795809e8b 100644
--- a/src/AllPlotWindow.cpp
+++ b/src/AllPlotWindow.cpp
@@ -169,7 +169,7 @@ void
 AllPlotWindow::setAllPlotWidgets(RideItem *ride)
 {
     if (ride->ride) {
-	RideFileDataPresent *dataPresent = ride->ride->areDataPresent();
+	const RideFileDataPresent *dataPresent = ride->ride->areDataPresent();
 	showPower->setEnabled(dataPresent->watts);
 	showHr->setEnabled(dataPresent->hr);
 	showSpeed->setEnabled(dataPresent->kph);
diff --git a/src/RideFile.h b/src/RideFile.h
index 390de1fe9..65bfb0a2d 100644
--- a/src/RideFile.h
+++ b/src/RideFile.h
@@ -88,7 +88,7 @@ class RideFile
         const QDateTime &startTime() const { return startTime_; }
         double recIntSecs() const { return recIntSecs_; }
         const QList<RideFilePoint*> dataPoints() const { return dataPoints_; }
-        inline RideFileDataPresent *areDataPresent() { return &dataPresent; }
+        inline const RideFileDataPresent *areDataPresent() const { return &dataPresent; }
         const QString &deviceType() const { return deviceType_; }
 
         void setStartTime(const QDateTime &value) { startTime_ = value; }