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diff --git a/sys/pmio/pmsectne.x b/sys/pmio/pmsectne.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include <pmset.h>
+include	<plio.h>
+
+# PM_SECTNOTEMPTY -- Test whether the indicated mask image section is empty.
+
+bool procedure pm_sectnotempty (pl, vs, ve, ndim)
+
+pointer	pl			#I mask descriptor
+long	vs[PM_MAXDIM]		#I starting coordinates of section
+long	ve[PM_MAXDIM]		#I ending coordinates of section
+int	ndim
+
+bool	pl_sectnotempty()
+include	"pmio.com"
+
+begin
+	if (PM_MAPXY(pl) == YES) {
+	    call amovkl ( 1, v1, PM_MAXDIM)
+	    call amovl (vs, v1, ndim)
+	    call imaplv (PM_REFIM(pl), v1, v2, PM_MAXDIM)
+
+	    call amovkl ( 1, v3, PM_MAXDIM)
+	    call amovl (ve, v3, ndim)
+	    call imaplv (PM_REFIM(pl), v3, v4, PM_MAXDIM)
+
+	    return (pl_sectnotempty (pl, v2, v4, PM_MAXDIM))
+
+	} else
+	    return (pl_sectnotempty (pl, vs, ve, ndim))
+end