diff --git a/src/backend/utils/adt/geo_ops.c b/src/backend/utils/adt/geo_ops.c
index 0b13c40054..6b6510e8e2 100644
--- a/src/backend/utils/adt/geo_ops.c
+++ b/src/backend/utils/adt/geo_ops.c
@@ -2019,10 +2019,6 @@ lseg_in(PG_FUNCTION_ARGS)
 				(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
 				 errmsg("invalid input syntax for type lseg: \"%s\"", str)));
 
-#ifdef NOT_USED
-	lseg->m = point_sl(&lseg->p[0], &lseg->p[1]);
-#endif
-
 	PG_RETURN_LSEG_P(lseg);
 }
 
@@ -2051,10 +2047,6 @@ lseg_recv(PG_FUNCTION_ARGS)
 	lseg->p[1].x = pq_getmsgfloat8(buf);
 	lseg->p[1].y = pq_getmsgfloat8(buf);
 
-#ifdef NOT_USED
-	lseg->m = point_sl(&lseg->p[0], &lseg->p[1]);
-#endif
-
 	PG_RETURN_LSEG_P(lseg);
 }
 
@@ -2091,10 +2083,6 @@ lseg_construct(PG_FUNCTION_ARGS)
 	result->p[1].x = pt2->x;
 	result->p[1].y = pt2->y;
 
-#ifdef NOT_USED
-	result->m = point_sl(pt1, pt2);
-#endif
-
 	PG_RETURN_LSEG_P(result);
 }
 
@@ -2106,10 +2094,6 @@ statlseg_construct(LSEG *lseg, Point *pt1, Point *pt2)
 	lseg->p[0].y = pt1->y;
 	lseg->p[1].x = pt2->x;
 	lseg->p[1].y = pt2->y;
-
-#ifdef NOT_USED
-	lseg->m = point_sl(pt1, pt2);
-#endif
 }
 
 Datum
@@ -2160,9 +2144,6 @@ lseg_parallel(PG_FUNCTION_ARGS)
 	LSEG	   *l1 = PG_GETARG_LSEG_P(0);
 	LSEG	   *l2 = PG_GETARG_LSEG_P(1);
 
-#ifdef NOT_USED
-	PG_RETURN_BOOL(FPeq(l1->m, l2->m));
-#endif
 	PG_RETURN_BOOL(FPeq(point_sl(&l1->p[0], &l1->p[1]),
 						point_sl(&l2->p[0], &l2->p[1])));
 }
diff --git a/src/include/utils/geo_decls.h b/src/include/utils/geo_decls.h
index 37bddc803f..0b6d3c32d1 100644
--- a/src/include/utils/geo_decls.h
+++ b/src/include/utils/geo_decls.h
@@ -68,8 +68,6 @@ typedef struct
 typedef struct
 {
 	Point		p[2];
-
-	double		m;				/* precomputed to save time, not in tuple */
 } LSEG;
 
 
diff --git a/src/test/regress/regress.c b/src/test/regress/regress.c
index 621a10dfcf..2e37d980af 100644
--- a/src/test/regress/regress.c
+++ b/src/test/regress/regress.c
@@ -212,7 +212,6 @@ regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2)
 	lseg->p[0].y = pt1->y;
 	lseg->p[1].x = pt2->x;
 	lseg->p[1].y = pt2->y;
-	lseg->m = point_sl(pt1, pt2);
 }
 
 PG_FUNCTION_INFO_V1(overpaid);