diff --git a/src/Particle/ParticleSetT.cpp b/src/Particle/ParticleSetT.cpp
index 0f51ace986c..760c8ba0050 100644
--- a/src/Particle/ParticleSetT.cpp
+++ b/src/Particle/ParticleSetT.cpp
@@ -1246,7 +1246,7 @@ void ParticleSetT<T>::applyBC(ParticlePos& pos)
 }
 
 template<typename T>
-void ParticleSetT<T>::applyMinimumImage(ParticlePos& pinout)
+void ParticleSetT<T>::applyMinimumImage(ParticlePos& pinout) const
 {
   if (getLattice().SuperCellEnum == SUPERCELL_OPEN)
     return;