diff --git a/data/fighters/hammerhead.json b/data/fighters/hammerhead.json
index fb28e10..45b74f9 100644
--- a/data/fighters/hammerhead.json
+++ b/data/fighters/hammerhead.json
@@ -22,6 +22,5 @@
 		"type" : "MISSILE_MISSILE",
 		"ammo" : 60
 	},
-	"flags" : "EF_AVOIDS_COMBAT",
-	"aiFlags" : "AIF_MISSILE_BOAT"
+	"aiFlags" : "AIF_MISSILE_BOAT+AIF_DEFENSIVE"
 }
diff --git a/data/fighters/khepri.json b/data/fighters/khepri.json
index 6875989..ba55a9e 100644
--- a/data/fighters/khepri.json
+++ b/data/fighters/khepri.json
@@ -27,6 +27,5 @@
 		"type" : "MISSILE_MISSILE",
 		"ammo" : 80
 	},
-	"flags" : "EF_AVOIDS_COMBAT",
-	"aiFlags" : "AIF_MISSILE_BOAT"
+	"aiFlags" : "AIF_MISSILE_BOAT+AIF_DEFENSIVE"
 }
diff --git a/data/fighters/list.json b/data/fighters/list.json
index a76964b..a9ad538 100644
--- a/data/fighters/list.json
+++ b/data/fighters/list.json
@@ -19,5 +19,8 @@
 	"data/fighters/kingfisher.json",
 	"data/fighters/mantis.json",
 	"data/fighters/rook.json",
-	"data/fighters/thunderhead.json"
+	"data/fighters/thunderhead.json",
+	"data/fighters/scarab.json",
+	"data/fighters/hammerhead.json",
+	"data/fighters/khepri.json"
 ]
diff --git a/data/fighters/scarab.json b/data/fighters/scarab.json
index 19ad298..95033e4 100644
--- a/data/fighters/scarab.json
+++ b/data/fighters/scarab.json
@@ -16,12 +16,16 @@
 			"type" : "BT_PLASMA",
 			"x" : 12,
 			"y" : 0
+		},
+		{
+			"type" : "BT_ROCKET",
+			"x" : 0,
+			"y" : 0
 		}
 	],
 	"missiles" : {
 		"type" : "MISSILE_MISSILE",
-		"ammo" : 60
+		"ammo" : 8
 	},
-	"flags" : "EF_AVOIDS_COMBAT",
-	"aiFlags" : "AIF_MISSILE_BOAT"
+	"aiFlags" : "AIF_MISSILE_BOAT+AIF_DEFENSIVE"
 }
diff --git a/src/battle/ai.c b/src/battle/ai.c
index eeb9c86..af5ccd7 100644
--- a/src/battle/ai.c
+++ b/src/battle/ai.c
@@ -55,6 +55,11 @@ void doAI(void)
 		return;
 	}
 	
+	if ((self->aiFlags & AIF_DEFENSIVE) && rand() % 50 && nearEnemies())
+	{
+		return;
+	}
+	
 	if ((self->aiFlags & AIF_GOAL_EXTRACTION) && nearExtractionPoint())
 	{
 		return;
diff --git a/src/defs.h b/src/defs.h
index 87c3135..5ae396a 100644
--- a/src/defs.h
+++ b/src/defs.h
@@ -83,6 +83,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #define AIF_RETREATS			(2 << 4)
 #define AIF_GOAL_EXTRACTION		(2 << 5)
 #define AIF_AVOIDS_COMBAT		(2 << 6)
+#define AIF_DEFENSIVE			(2 << 7)
+#define AIF_MISSILE_BOAT		(2 << 8)
 
 /* player abilities */
 #define BOOST_RECHARGE_TIME 	(FPS * 7)
diff --git a/src/system/lookup.c b/src/system/lookup.c
index 45c77d3..5108163 100644
--- a/src/system/lookup.c
+++ b/src/system/lookup.c
@@ -51,6 +51,8 @@ void initLookups(void)
 	addLookup("AIF_RETREATS", AIF_RETREATS);
 	addLookup("AIF_GOAL_EXTRACTION", AIF_GOAL_EXTRACTION);
 	addLookup("AIF_AVOIDS_COMBAT", AIF_AVOIDS_COMBAT);
+	addLookup("AIF_DEFENSIVE", AIF_DEFENSIVE);
+	addLookup("AIF_MISSILE_BOAT", AIF_MISSILE_BOAT);
 	
 	addLookup("TT_DESTROY", TT_DESTROY);
 	addLookup("TT_DISABLE", TT_DISABLE);