diff --git a/vcg/complex/trimesh/crease_cut.h b/vcg/complex/trimesh/crease_cut.h
index 65823559..19bcfaf7 100644
--- a/vcg/complex/trimesh/crease_cut.h
+++ b/vcg/complex/trimesh/crease_cut.h
@@ -77,7 +77,7 @@ void CreaseCut(MESH_TYPE &m, float angleRad)
 	int creaseCounter=0;
 	int startVn=m.vn;
 	FaceIterator fi;
-	const FaceType * nextf;
+	//const FaceType * nextf;
 	for(fi=m.face.begin();fi!=m.face.end();++fi) 
 		 for(int j=0;j<3;++j) 
 				if(!(*fi).V(j)->IsV() )  // foreach unvisited vertex we loop around it searching for creases.
@@ -131,7 +131,7 @@ void CreaseCut(MESH_TYPE &m, float angleRad)
 			int curVertexInd = indVec[faceInd*3+ j];
 			assert(curVertexInd != -1);
 			assert(curVertexInd < m.vn);
-			if(curVertexInd < startVn) assert(curVertexInd == vertInd); 
+			if(curVertexInd < startVn) assert(size_t(curVertexInd) == vertInd); 
 			if(curVertexInd >= startVn)
 				{
 				  m.vert[curVertexInd].ImportLocal(*((*fi).V(j)));
diff --git a/vcg/math/histogram.h b/vcg/math/histogram.h
index 067736c2..26d0c4a7 100644
--- a/vcg/math/histogram.h
+++ b/vcg/math/histogram.h
@@ -425,7 +425,7 @@ ScalarType Histogram<ScalarType>::Percentile(ScalarType frac) const
 	assert(frac >= 0 && frac <= 1);
 	
 	ScalarType sum=0,partsum=0;
-	int i;
+	size_t i;
 
 	// useless summation just to be sure 
 	for(i=0;i<H.size();i++) sum+=H[i]; 
diff --git a/wrap/qt/trackball.h b/wrap/qt/trackball.h
index a845f8ef..ac43476b 100644
--- a/wrap/qt/trackball.h
+++ b/wrap/qt/trackball.h
@@ -47,7 +47,7 @@ static vcg::Trackball::Button QT2VCG (Qt::MouseButton qtbt, Qt::KeyboardModifier
 }
 
 /// Takes a QT ket and QT KeyboardModifiers and returns the mouse wheel related Trackball::Button
-static vcg::Trackball::Button QTWheel2VCG (Qt::KeyboardModifiers modifiers)
+inline vcg::Trackball::Button QTWheel2VCG (Qt::KeyboardModifiers modifiers)
 {
   int vcgbt = vcg::Trackball::WHEEL;
 
@@ -59,7 +59,7 @@ static vcg::Trackball::Button QTWheel2VCG (Qt::KeyboardModifiers modifiers)
 }
 
 /// Takes some QT KeyboardModifiers and returns the mouse wheel related Trackball::Button
-static vcg::Trackball::Button QTKey2VCG (int key, Qt::KeyboardModifiers modifiers)
+inline vcg::Trackball::Button QTKey2VCG (int key, Qt::KeyboardModifiers modifiers)
 {
   int vcgbt = 0;
 	switch (key) {