diff --git a/src/meshlabplugins/epoch_io/epoch_camera.cpp b/src/meshlabplugins/epoch_io/epoch_camera.cpp
index fc90d0cf4..aaa16097a 100644
--- a/src/meshlabplugins/epoch_io/epoch_camera.cpp
+++ b/src/meshlabplugins/epoch_io/epoch_camera.cpp
@@ -65,7 +65,7 @@ bool EpochCamera::Open(const char *filename)
   // on the right the rotated translation -Rt and 0001 in the 
   // lower line.
 
-  R = R.transpose().eval();
+  R.transposeInPlace();
   #ifndef VCG_USE_EIGEN
   for(int i=0;i<3;++i)
     for(int j=0;j<3;++j)
diff --git a/src/meshlabplugins/io_x3d/import_x3d.h b/src/meshlabplugins/io_x3d/import_x3d.h
index 9af61ac45..5110da68f 100644
--- a/src/meshlabplugins/io_x3d/import_x3d.h
+++ b/src/meshlabplugins/io_x3d/import_x3d.h
@@ -2209,7 +2209,7 @@ namespace io {
 			{
 				vcg::Point3f normal(list.at(index).toFloat(), list.at(index + 1).toFloat(), list.at( index+ 2).toFloat());
 				vcg::Matrix44f intr44 = vcg::Inverse(tMatrix);
-				intr44 = intr44.transpose().eval();
+				intr44.transposeInPlace();
 				Matrix33f intr33;
 				for(unsigned int rr = 0; rr < 2; ++rr)
 				{