diff --git a/dlls/scientist.cpp b/dlls/scientist.cpp
index 1256e111..3d8007a7 100644
--- a/dlls/scientist.cpp
+++ b/dlls/scientist.cpp
@@ -535,13 +535,13 @@ void CScientist::HandleAnimEvent( MonsterEvent_t *pEvent )
 	case SCIENTIST_AE_NEEDLEON:
 		{
 			int oldBody = pev->body;
-			pev->body = ( oldBody % NUM_SCIENTIST_HEADS ) + NUM_SCIENTIST_HEADS * 1;
+			pev->body = ( oldBody % NUM_SCIENTIST_HEADS_OPFOR ) + NUM_SCIENTIST_HEADS_OPFOR * 1;
 		}
 		break;
 	case SCIENTIST_AE_NEEDLEOFF:
 		{
 			int oldBody = pev->body;
-			pev->body = ( oldBody % NUM_SCIENTIST_HEADS ) + NUM_SCIENTIST_HEADS * 0;
+			pev->body = ( oldBody % NUM_SCIENTIST_HEADS_OPFOR ) + NUM_SCIENTIST_HEADS_OPFOR * 0;
 		}
 		break;
 	default:
@@ -650,12 +650,14 @@ void CScientist::TalkInit()
 		m_voicePitch = 105;
 		break;	//glasses
 	case HEAD_EINSTEIN:
+	case HEAD_EINSTEIN_WITH_BOOK:
 		m_voicePitch = 100;
 		break;	//einstein
 	case HEAD_LUTHER:
 		m_voicePitch = 95;
 		break;	//luther
 	case HEAD_SLICK:
+	case HEAD_SLICK_WITH_STICK:
 		m_voicePitch = 100;
 		break;	//slick
 	}
diff --git a/dlls/scientist.h b/dlls/scientist.h
index c04f45c5..4ed38013 100644
--- a/dlls/scientist.h
+++ b/dlls/scientist.h
@@ -16,9 +16,10 @@
 #ifndef SCIENTIST_H
 #define SCIENTIST_H
 
-#define		NUM_SCIENTIST_HEADS		4 // four heads available for scientist model
+#define		NUM_SCIENTIST_HEADS		4 // four heads available for scientist model, used when randoming a scientist head
+#define		NUM_SCIENTIST_HEADS_OPFOR		6 // used for body change when scientist uses the needle
 
-enum { HEAD_GLASSES = 0, HEAD_EINSTEIN = 1, HEAD_LUTHER = 2, HEAD_SLICK = 3 };
+enum { HEAD_GLASSES = 0, HEAD_EINSTEIN = 1, HEAD_LUTHER = 2, HEAD_SLICK = 3, HEAD_EINSTEIN_WITH_BOOK = 4, HEAD_SLICK_WITH_STICK = 5 };
 
 enum
 {