diff --git a/src/drivers/Qt/TasEditor/TasEditorWindow.cpp b/src/drivers/Qt/TasEditor/TasEditorWindow.cpp
index 7d8dbcef..82f2d43b 100644
--- a/src/drivers/Qt/TasEditor/TasEditorWindow.cpp
+++ b/src/drivers/Qt/TasEditor/TasEditorWindow.cpp
@@ -4566,7 +4566,7 @@ void QPianoRoll::wheelEvent(QWheelEvent *event)
 
 	if (!numPixels.isNull())
 	{
-		wheelPixelCounter -= numPixels.y();
+		wheelPixelCounter += numPixels.y();
 		//printf("numPixels: (%i,%i) \n", numPixels.x(), numPixels.y() );
 	}
 	else if (!numDegrees.isNull())
@@ -4574,7 +4574,7 @@ void QPianoRoll::wheelEvent(QWheelEvent *event)
 		//QPoint numSteps = numDegrees / 15;
 		//printf("numSteps: (%i,%i) \n", numSteps.x(), numSteps.y() );
 		//printf("numDegrees: (%i,%i)  %i\n", numDegrees.x(), numDegrees.y(), pxLineSpacing );
-		wheelPixelCounter -= (pxLineSpacing * numDegrees.y()) / (15 * 8);
+		wheelPixelCounter += (pxLineSpacing * numDegrees.y()) / (15 * 8);
 	}
 	//printf("Wheel Event: %i\n", wheelPixelCounter);
 
diff --git a/src/drivers/Qt/TraceLogger.cpp b/src/drivers/Qt/TraceLogger.cpp
index c1680bf1..4c098123 100644
--- a/src/drivers/Qt/TraceLogger.cpp
+++ b/src/drivers/Qt/TraceLogger.cpp
@@ -1751,7 +1751,7 @@ void QTraceLogView::wheelEvent(QWheelEvent *event)
 
 	if (!numPixels.isNull())
 	{
-		wheelPixelCounter -= numPixels.y();
+		wheelPixelCounter += numPixels.y();
 		//printf("numPixels: (%i,%i) \n", numPixels.x(), numPixels.y() );
 	}
 	else if (!numDegrees.isNull())
@@ -1759,7 +1759,7 @@ void QTraceLogView::wheelEvent(QWheelEvent *event)
 		//QPoint numSteps = numDegrees / 15;
 		//printf("numSteps: (%i,%i) \n", numSteps.x(), numSteps.y() );
 		//printf("numDegrees: (%i,%i)  %i\n", numDegrees.x(), numDegrees.y(), pxLineSpacing );
-		wheelPixelCounter -= (pxLineSpacing * numDegrees.y()) / (15 * 8);
+		wheelPixelCounter += (pxLineSpacing * numDegrees.y()) / (15 * 8);
 	}
 	//printf("Wheel Event: %i\n", wheelPixelCounter);