diff --git a/src/zeroD/FlowReactor.cpp b/src/zeroD/FlowReactor.cpp
index 4653ba433..244541f7c 100644
--- a/src/zeroD/FlowReactor.cpp
+++ b/src/zeroD/FlowReactor.cpp
@@ -13,8 +13,13 @@ using namespace std;
 namespace Cantera
 {
 
-FlowReactor::FlowReactor() : Reactor(), m_fctr(1.0e10),
-    m_speed0(0.0) {}
+FlowReactor::FlowReactor() :
+    Reactor(),
+    m_fctr(1.0e10),
+    m_speed0(0.0),
+    m_dist(0.0)
+{
+}
 
 // overloaded method of FuncEval. Called by the integrator to
 // get the initial conditions.