Index: marble/src/lib/Projections/SphericalProjection.cpp
===================================================================
--- marble/src/lib/Projections/SphericalProjection.cpp	(revision 871408)
+++ marble/src/lib/Projections/SphericalProjection.cpp	(working copy)
@@ -263,7 +263,7 @@
 
                 // We take the manhattan length as a distance approximation
                 // that can be too big by a factor of sqrt(2)
-                qreal distance =   fabs(x - previousX) + fabs(y - previousY);
+                qreal distance =   fabs((qreal)(x - previousX)) + fabs((qreal)(y - previousY));
 
                 // FIXME: This is a work around: remove as soon as we handle horizon crossing
                 if ( globeHidesPoint || previousGlobeHidesPoint ) {