diff --git a/common/main/ai.h b/common/main/ai.h
index 852538637..8a5c939d9 100644
--- a/common/main/ai.h
+++ b/common/main/ai.h
@@ -110,7 +110,6 @@ extern void init_robots_for_level(void);
 extern int ai_behavior_to_mode(int behavior);
 #if defined(DXX_BUILD_DESCENT_II)
 extern void create_path_to_segment(object *objp, int goalseg, int max_length, int safety_flag);
-extern int ready_to_fire(robot_info *robptr, ai_local *ailp);
 extern int polish_path(object *objp, point_seg *psegs, int num_points);
 extern void move_towards_player(object *objp, vms_vector *vec_to_player);
 #endif
diff --git a/d2x-rebirth/main/ai.c b/d2x-rebirth/main/ai.c
index debfce2a6..1eaebd029 100644
--- a/d2x-rebirth/main/ai.c
+++ b/d2x-rebirth/main/ai.c
@@ -286,6 +286,18 @@ static const sbyte Ai_transition_table[AI_MAX_EVENT][AI_MAX_STATE][AI_MAX_STATE]
 	}
 };
 
+// ----------------------------------------------------------------------------
+// Return firing status.
+// If ready to fire a weapon, return true, else return false.
+// Ready to fire a weapon if next_fire <= 0 or next_fire2 <= 0.
+static int ready_to_fire(robot_info *robptr, ai_local *ailp)
+{
+	if (robptr->weapon_type2 != -1)
+		return (ailp->next_fire <= 0) || (ailp->next_fire2 <= 0);
+	else
+		return (ailp->next_fire <= 0);
+}
+
 // ---------------------------------------------------------------------------------------------------------------------
 //	Given a behavior, set initial mode.
 int ai_behavior_to_mode(int behavior)
@@ -2403,18 +2415,6 @@ void init_ai_frame(void)
 	}
 }
 
-// ----------------------------------------------------------------------------
-// Return firing status.
-// If ready to fire a weapon, return true, else return false.
-// Ready to fire a weapon if next_fire <= 0 or next_fire2 <= 0.
-int ready_to_fire(robot_info *robptr, ai_local *ailp)
-{
-	if (robptr->weapon_type2 != -1)
-		return (ailp->next_fire <= 0) || (ailp->next_fire2 <= 0);
-	else
-		return (ailp->next_fire <= 0);
-}
-
 // ----------------------------------------------------------------------------
 // Make a robot near the player snipe.
 #define	MNRS_SEG_MAX	70