diff --git a/src/forwardeuler.cpp b/src/forwardeuler.cpp
--- a/src/forwardeuler.cpp
+++ b/src/forwardeuler.cpp
@@ -67,6 +67,10 @@ void ForwardEuler::odeint(double *ystart
   routine to be used. */
 {
   static bool warning_issued = false;
+
+  eps = hmin = 0.0; // use assignment merely to obviate compilation warning
+  nbad = nok = NULL;
+
   if (!warning_issued) {
     cerr << "Using inaccurate method ForwardEuler\n";
     warning_issued=true;