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diff --git a/sys/qpoe/qpastr.x b/sys/qpoe/qpastr.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	"qpoe.h"
+
+# QP_ASTR -- Set the value of a string parameter, creating the parameter if
+# it does not already exist.  This works for the common case of string
+# parameters allocated a fixed amount of space at create time (any type of
+# string parameter can be written into if it already exists).  Additional
+# control over the parameter attributes is possible if the parameter is
+# explicitly created with qp_addf before being written into.
+
+procedure qp_astr (qp, param, value, comment)
+
+pointer	qp			#I QPOE descriptor
+char	param[ARB]		#I parameter name
+char	value[ARB]		#I parameter value
+char	comment[ARB]		#I comment field, if creating parameter
+
+int	nchars
+int	qp_accessf(), strlen()
+errchk	qp_accessf, qp_addf
+
+begin
+	# By default we allocate a somewhat bigger storage area than needed
+	# to store the string, to permit updates of a similar length.	If
+	# more control over the maximum string length is needed, QP_ADDF
+	# should be called explicitly.
+
+	if (qp_accessf (qp, param) == NO) {
+	    nchars = (strlen(value) + INC_STRLEN-1) / INC_STRLEN * INC_STRLEN
+	    call qp_addf (qp, param, "c", nchars, comment, 0)
+	}
+
+	call qp_pstr (qp, param, value)
+end