diff --git a/examples/top_hat/top_hat.xml b/examples/top_hat/top_hat.xml
index 45edabd262..8c63796e7b 100644
--- a/examples/top_hat/top_hat.xml
+++ b/examples/top_hat/top_hat.xml
@@ -3,9 +3,9 @@
tophat
- fluidity -v2 -l top_hat_cg.flml &&
-fluidity -v2 -l top_hat_dg.flml &&
-fluidity -v2 -l top_hat_cv.flml
+ mpiexec fluidity -v2 -l top_hat_cg.flml &&
+mpiexec fluidity -v2 -l top_hat_dg.flml &&
+mpiexec fluidity -v2 -l top_hat_cv.flml
import fluidity_tools