diff --git a/mp/src/game/server/ai_basenpc.cpp b/mp/src/game/server/ai_basenpc.cpp
index 54b476360..468d983d3 100644
--- a/mp/src/game/server/ai_basenpc.cpp
+++ b/mp/src/game/server/ai_basenpc.cpp
@@ -3222,7 +3222,10 @@ void CAI_BaseNPC::UpdateEfficiency( bool bInPVS )
 				}
 			}
 			
-			iSound = pCurrentSound->NextSound();
+			if (pCurrentSound)
+				iSound = pCurrentSound->NextSound();
+			else
+				break;
 		}
 	}
 
@@ -3409,7 +3412,10 @@ void CAI_BaseNPC::UpdateSleepState( bool bInPVS )
 							break;
 						}
 
-						iSound = pCurrentSound->NextSound();
+						if (pCurrentSound)
+							iSound = pCurrentSound->NextSound();
+						else
+							break;
 					}
 				}
 			}