diff --git a/dlls/islave.cpp b/dlls/islave.cpp
index 577eda24..ba194cea 100644
--- a/dlls/islave.cpp
+++ b/dlls/islave.cpp
@@ -732,6 +732,7 @@ void CISlave::ArmBeam( int side )
 	m_pBeam[m_iBeams]->SetColor( 96, 128, 16 );
 	m_pBeam[m_iBeams]->SetBrightness( 64 );
 	m_pBeam[m_iBeams]->SetNoise( 80 );
+	m_pBeam[m_iBeams]->pev->spawnflags |= SF_BEAM_TEMPORARY; // Flag these to be destroyed on save/restore or level transition
 	m_iBeams++;
 }
 
@@ -776,6 +777,7 @@ void CISlave::WackBeam( int side, CBaseEntity *pEntity )
 	m_pBeam[m_iBeams]->SetColor( 180, 255, 96 );
 	m_pBeam[m_iBeams]->SetBrightness( 255 );
 	m_pBeam[m_iBeams]->SetNoise( 80 );
+	m_pBeam[m_iBeams]->pev->spawnflags |= SF_BEAM_TEMPORARY; // Flag these to be destroyed on save/restore or level transition
 	m_iBeams++;
 }
 
@@ -806,6 +808,7 @@ void CISlave::ZapBeam( int side )
 	m_pBeam[m_iBeams]->SetColor( 180, 255, 96 );
 	m_pBeam[m_iBeams]->SetBrightness( 255 );
 	m_pBeam[m_iBeams]->SetNoise( 20 );
+	m_pBeam[m_iBeams]->pev->spawnflags |= SF_BEAM_TEMPORARY; // Flag these to be destroyed on save/restore or level transition
 	m_iBeams++;
 
 	pEntity = CBaseEntity::Instance( tr.pHit );