--- ray/src/common/free_os.c	2003/02/25 02:47:21	3.2
+++ ray/src/common/free_os.c	2013/11/08 17:11:42	3.5
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: free_os.c,v 3.2 2003/02/25 02:47:21 greg Exp $";
+static const char	RCSid[] = "$Id: free_os.c,v 3.5 2013/11/08 17:11:42 greg Exp $";
 #endif
 /*
  * Free memory associated with object(s)
@@ -16,11 +16,13 @@ static const char	RCSid[] = "$Id: free_os.c,v 3.2 2003
 #include "face.h"
 #include "cone.h"
 #include "instance.h"
+#include "mesh.h"
 
 
 int
-free_os(op)			/* free unneeded memory for object */
-register OBJREC	*op;
+free_os(			/* free unneeded memory for object */
+	OBJREC	*op
+)
 {
 	if (op->os == NULL)
 		return(0);
@@ -37,6 +39,9 @@ register OBJREC	*op;
 		return(1);
 	case OBJ_INSTANCE:	/* octree instance */
 		freeinstance(op);
+		return(1);
+	case OBJ_MESH:		/* mesh instance */
+		freemeshinst(op);
 		return(1);
 	}
 				/* don't really know */