diff --git a/src/osgUtil/DriveManipulator.cpp b/src/osgUtil/DriveManipulator.cpp
index 94ee6eedc..48241db81 100644
--- a/src/osgUtil/DriveManipulator.cpp
+++ b/src/osgUtil/DriveManipulator.cpp
@@ -405,7 +405,7 @@ bool DriveManipulator::calcMovement()
 
     float dx = _ga_t0->getX()-mx;
 
-    float yaw = inDegrees(dx*0.1f*dt);
+    float yaw = -inDegrees(dx*0.1f*dt);
 
     osg::Matrix mat;
     mat.makeTrans(-center.x(),-center.y(),-center.z());
diff --git a/src/osgUtil/FlightManipulator.cpp b/src/osgUtil/FlightManipulator.cpp
index 0e6eff356..39e65bc66 100644
--- a/src/osgUtil/FlightManipulator.cpp
+++ b/src/osgUtil/FlightManipulator.cpp
@@ -201,8 +201,8 @@ bool FlightManipulator::calcMovement()
     osg::Vec3 sv = _camera->getSideVector();
     osg::Vec3 lv = _camera->getLookVector();
 
-    float pitch = inDegrees(-dy*0.15f*dt);
-    float roll = inDegrees(-dx*0.1f*dt);
+    float pitch = inDegrees(dy*0.15f*dt);
+    float roll = inDegrees(dx*0.1f*dt);
 
     osg::Matrix mat;
     mat.makeTrans(-center);
@@ -211,7 +211,7 @@ bool FlightManipulator::calcMovement()
     if (_yawMode==YAW_AUTOMATICALLY_WHEN_BANKED)
     {
         float bank = asinf(sv.z());
-        float yaw = inRadians(-bank)*dt;
+        float yaw = inRadians(bank)*dt;
         mat *= Matrix::rotate(yaw,0.0f,0.0f,1.0f);
     }