diff --git a/Cantera/src/oneD/Sim1D.cpp b/Cantera/src/oneD/Sim1D.cpp
index 83551e37e..a36fcf0ae 100644
--- a/Cantera/src/oneD/Sim1D.cpp
+++ b/Cantera/src/oneD/Sim1D.cpp
@@ -109,7 +109,7 @@ namespace Cantera {
      */
     void Sim1D::restore(string fname, string id) {
         ifstream s(fname.c_str());
-        char buf[100];
+        //char buf[100];
         if (!s) 
             throw CanteraError("Sim1D::restore",
                 "could not open input file "+fname);
@@ -351,7 +351,7 @@ namespace Cantera {
         int gridstart = 0, gridsize;
         for (n = 0; n < m_nd; n++) {
             Domain1D& d = domain(n);
-            Refiner& r = d.refiner();
+            //            Refiner& r = d.refiner();
             gridsize = dsize[n]; // d.nPoints() + r.nNewPoints();
             d.setupGrid(gridsize, znew.begin() + gridstart);
             gridstart += gridsize;
diff --git a/Cantera/src/oneD/boundaries1D.cpp b/Cantera/src/oneD/boundaries1D.cpp
index 096832338..6c7977a98 100644
--- a/Cantera/src/oneD/boundaries1D.cpp
+++ b/Cantera/src/oneD/boundaries1D.cpp
@@ -352,7 +352,7 @@ namespace Cantera {
 
         r[0] = x[0];
         diag[0] = 0;
-        int nc, n;
+        int nc;
 
         if (m_flow_right) {
             nc = m_flow_right->nComponents();
diff --git a/Cantera/src/oneD/refine.cpp b/Cantera/src/oneD/refine.cpp
index d95ff486f..5f400a864 100644
--- a/Cantera/src/oneD/refine.cpp
+++ b/Cantera/src/oneD/refine.cpp
@@ -123,7 +123,7 @@ namespace Cantera {
                 
                     dmax = m_slope*(vmax - vmin) + m_thresh;
                     for (j = 0; j < n-1; j++) {
-                        r = abs(v[j+1] - v[j])/dmax;
+                        r = fabs(v[j+1] - v[j])/dmax;
                         if (r > 1.0) {
                             m_loc[j] = 1;
                             m_c[name] = 1;
@@ -148,7 +148,7 @@ namespace Cantera {
                     // adjacent points.
                     dmax = m_curve*(smax - smin); // + 0.5*m_curve*(smax + smin);
                     for (j = 0; j < n-2; j++) {
-                        r = abs(s[j+1] - s[j]) / (dmax + m_thresh/dz[j]);
+                        r = fabs(s[j+1] - s[j]) / (dmax + m_thresh/dz[j]);
                         if (r > 1.0) {
                             m_c[name] = 1;
                             m_loc[j] = 1;