diff --git a/MAAS/maas.sql b/MAAS/maas.sql
index 8461cec8b..72fb9511e 100644
--- a/MAAS/maas.sql
+++ b/MAAS/maas.sql
@@ -283,11 +283,19 @@ BEGIN
          -- Bepalen van opdrachtvolgnr
          v_errormsg := '(0x248)' || v_mldkey || psubject || v_actie;
          v_opdrvolgnr :=
-            (SUBSTR (
-                SUBSTR (psubject,
-                        INSTR (psubject, 'Facilitor opdracht:') + 19),
-                0,
-                1));
+		   SUBSTR (
+			  SUBSTR (
+				 SUBSTR (psubject, INSTR (psubject, 'Facilitor opdracht:') + 19),
+				 0),
+			  --6
+			  INSTR (
+				 SUBSTR (
+					SUBSTR (psubject,
+							INSTR (psubject, 'Facilitor opdracht:') + 19),
+					0),
+				 '/')
+			  + 1,
+			  1);
 
          -- Bepalen van de mld_opdr_key
          -- Uitgangspunt is 1 opdracht per melding