diff --git a/common/main/segpoint.h b/common/main/segpoint.h
index f5c951569..449144178 100644
--- a/common/main/segpoint.h
+++ b/common/main/segpoint.h
@@ -28,9 +28,8 @@ COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
 #define _SEGPOINTS_H
 
 #include "segment.h"
+#include "3d.h"
 
-struct g3s_point;
-
-extern	g3s_point	Segment_points[MAX_VERTICES];
+extern	array<g3s_point, MAX_VERTICES>	Segment_points;
 
 #endif /* _SEGPOINTS_H */
diff --git a/similar/main/mglobal.cpp b/similar/main/mglobal.cpp
index 7d735ad5a..72a2013a0 100644
--- a/similar/main/mglobal.cpp
+++ b/similar/main/mglobal.cpp
@@ -35,7 +35,7 @@ COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
 
 // Global array of vertices, common to one mine.
 vms_vector Vertices[MAX_VERTICES];
-g3s_point Segment_points[MAX_VERTICES];
+array<g3s_point, MAX_VERTICES> Segment_points;
 
 fix FrameTime = 0x1000;	// Time since last frame, in seconds
 fix64 GameTime64 = 0;			//	Time in game, in seconds