diff --git a/DDG4/plugins/Geant4SensDetFilters.cpp b/DDG4/plugins/Geant4SensDetFilters.cpp
index feac568e9dd24954cee366346b41bf3e8aeb8cdf..5ba9fbd718e28b61ca8cb45562eba16cf50ba5fc 100644
--- a/DDG4/plugins/Geant4SensDetFilters.cpp
+++ b/DDG4/plugins/Geant4SensDetFilters.cpp
@@ -205,7 +205,7 @@ ParticleRejectFilter::~ParticleRejectFilter() {
 
 /// Filter action. Return true if hits should be processed
 bool ParticleRejectFilter::operator()(const G4Step* step) const   {
-  return isSameType(step->GetTrack());
+  return !isSameType(step->GetTrack());
 }
 
 /// Constructor.
@@ -221,7 +221,7 @@ ParticleSelectFilter::~ParticleSelectFilter() {
 
 /// Filter action. Return true if hits should be processed
 bool ParticleSelectFilter::operator()(const G4Step* step) const   {
-  return !isSameType(step->GetTrack());
+  return isSameType(step->GetTrack());
 }
 
 /// Constructor.