diff --git a/mp/src/game/server/ai_senses.cpp b/mp/src/game/server/ai_senses.cpp
index 6c302d624..b1f2b94bc 100644
--- a/mp/src/game/server/ai_senses.cpp
+++ b/mp/src/game/server/ai_senses.cpp
@@ -133,7 +133,10 @@ void CAI_Senses::Listen( void )
 				m_iAudibleList = iSound;
 			}
 
-			iSound = pCurrentSound->NextSound();
+			if (pCurrentSound)
+				iSound = pCurrentSound->NextSound();
+			else
+				break;
 		}
 	}