diff --git a/samples/cxx/flamespeed/flamespeed.cpp b/samples/cxx/flamespeed/flamespeed.cpp
index f612d4b86..96ba18e8d 100644
--- a/samples/cxx/flamespeed/flamespeed.cpp
+++ b/samples/cxx/flamespeed/flamespeed.cpp
@@ -51,7 +51,8 @@ int flamespeed(double phi)
 
         //-------- step 1: create the flow -------------
 
-        FreeFlame flow(&gas);
+        StFlow flow(&gas);
+        flow.setFreeFlow();
 
         // create an initial grid
         int nz = 6;