diff --git a/src/simulation/Simulation.cpp b/src/simulation/Simulation.cpp
index 3b52e438b..8abb7f2db 100644
--- a/src/simulation/Simulation.cpp
+++ b/src/simulation/Simulation.cpp
@@ -4107,7 +4107,7 @@ void Simulation::UpdateParticles(int start, int end)
 					else s = 0;
 				}
 				else s = 0;
-			} else if (elements[t].LowPressureTransition>-1 && pv[y/CELL][x/CELL]<elements[t].LowPressure) {
+			} else if (elements[t].LowPressureTransition>-1 && pv[y/CELL][x/CELL]<elements[t].LowPressure && gravtot<(elements[t].LowPressure/4.0f)) {
 				// particle type change due to low pressure
 				if (elements[t].LowPressureTransition!=PT_NUM)
 					t = elements[t].LowPressureTransition;