diff --git a/lib/nBodySim.cpp b/lib/nBodySim.cpp
index 256152ec54eb488c0ab98eafe4f9b5d187c7554f..cf6a5f778dd6e9c5acc5964ccfa1606a65102589 100644
--- a/lib/nBodySim.cpp
+++ b/lib/nBodySim.cpp
@@ -68,7 +68,6 @@ void nBodySim::runSimulation(double dt, unsigned nSteps) {
     std::ofstream energyFile("../out/energy.dat");
 
     positionsFile << nParticles_ << " " << skip << " " << dt << std::endl;
-    energyFile << nParticles_ << " " << skip << " " << dt << std::endl;
 
     for (unsigned i=0; i < nSteps; ++i) {