diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
index 6d775bbb76..2c6f1e44cc 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
@@ -6021,16 +6021,16 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             return 1;
         }
 
-        public void osParticleSystem(LSL_List rules, LSL_Integer expire)
+        public void osParticleSystem(LSL_List rules)
         {
             m_host.AddScriptLPS(1);
 
             InitLSL();
             if (m_LSL_Api != null)
-                m_LSL_Api.SetParticleSystem(m_host, rules, "osParticleSystem", expire == 1);
+                m_LSL_Api.SetParticleSystem(m_host, rules, "osParticleSystem", true);
         }
 
-        public void osLinkParticleSystem(LSL_Integer linknumber, LSL_List rules, LSL_Integer expire)
+        public void osLinkParticleSystem(LSL_Integer linknumber, LSL_List rules)
         {
             InitLSL();
             if (m_LSL_Api != null)
@@ -6039,7 +6039,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
                 foreach (SceneObjectPart part in parts)
                 {
-                    m_LSL_Api.SetParticleSystem(part, rules, "osLinkParticleSystem", expire == 1);
+                    m_LSL_Api.SetParticleSystem(part, rules, "osLinkParticleSystem", true);
                 }
             }
         }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
index 24ab2bbad7..3e079dbc12 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
@@ -587,7 +587,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
           LSL_Float daylen, LSL_Float dayoffset, LSL_Float altitude1, LSL_Float altitude2, LSL_Float altitude3);
         LSL_Integer osResetEnvironment(LSL_Integer parcelOrRegion, LSL_Integer transition);
 
-        void osParticleSystem(LSL_List rules, LSL_Integer expire);
-        void osLinkParticleSystem(LSL_Integer linknumber, LSL_List rules, LSL_Integer expire);
+        void osParticleSystem(LSL_List rules);
+        void osLinkParticleSystem(LSL_Integer linknumber, LSL_List rules);
     }
 }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
index 8de63b9c0d..5edbca66cc 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
@@ -1534,14 +1534,14 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
             return m_OSSL_Functions.osResetEnvironment(parcelOrRegion, transition);
         }
 
-        public void osParticleSystem(LSL_List rules, LSL_Integer expire)
+        public void osParticleSystem(LSL_List rules)
         {
-            m_OSSL_Functions.osParticleSystem(rules, expire);
+            m_OSSL_Functions.osParticleSystem(rules);
         }
 
-        public void osLinkParticleSystem(LSL_Integer linknumber, LSL_List rules, LSL_Integer expire)
+        public void osLinkParticleSystem(LSL_Integer linknumber, LSL_List rules)
         {
-            m_OSSL_Functions.osLinkParticleSystem(linknumber, rules, expire);
+            m_OSSL_Functions.osLinkParticleSystem(linknumber, rules);
         }
     }
 }