diff --git a/APPL/BES/addFavourites.asp b/APPL/BES/addFavourites.asp
index 3eb2f8233a..0bd8099773 100644
--- a/APPL/BES/addFavourites.asp
+++ b/APPL/BES/addFavourites.asp
@@ -102,7 +102,7 @@ function doSubmit()
         <td class='label'><label for="fav"><%=L("lcl_bes_favour_list")%>:</label></td>
         <td><select name="fav" id="fav"><%
           // eigen favorieten lijsten van een bepaalde categorie
-          sql = " SELECT '" + L("lcl_bes_select_fav_list") + "', 'A' FROM DUAL"
+          sql = " SELECT " + safe.quoted_sql(L("lcl_bes_select_fav_list")) + ", 'A' FROM DUAL"
               + " UNION"
               + " SELECT bf.bes_favoriet_naam"
               + ", 'B'"
diff --git a/APPL/CNT/cnt_show_scope.asp b/APPL/CNT/cnt_show_scope.asp
index 0b8eb20f91..c011833868 100644
--- a/APPL/CNT/cnt_show_scope.asp
+++ b/APPL/CNT/cnt_show_scope.asp
@@ -167,7 +167,7 @@ var showall = getQParamInt("showall", 0) == 1;
                   + " AND co.cnt_mld_melding_key IS NULL"
                   + " AND co.cnt_contract_key = " + cnt_key + ""
                   + " UNION"
-                  + " SELECT '" + L("lcl_location") + "' plaatsaanduiding"
+                  + " SELECT " + safe.quoted_sql(L("lcl_location")) + " plaatsaanduiding"
                   + ", null totaal_opp"
                   + ", co.cnt_contract_onrgoed_opp contract_opp"
                   + ", sr.alg_srtruimte_code tariefsrt"
diff --git a/APPL/FAC/fac_locale_data.asp b/APPL/FAC/fac_locale_data.asp
index 3aec5bc616..ca043f1861 100644
--- a/APPL/FAC/fac_locale_data.asp
+++ b/APPL/FAC/fac_locale_data.asp
@@ -116,7 +116,7 @@ var maxlen = oRs(0).Value;
         for (i in lcl.languages)
         {
             if (i != db_lang)
-                talen_arr.push("SELECT '" + i + "' fac_locale_lang FROM DUAL");
+                talen_arr.push("SELECT " + safe.quoted_sql(i) + " fac_locale_lang FROM DUAL");
         }
 
         var talen = talen_arr.join(" UNION ");
diff --git a/APPL/MLD/opdr_accept_offer.asp b/APPL/MLD/opdr_accept_offer.asp
index adeff0f5eb..d1ffe4e42f 100644
--- a/APPL/MLD/opdr_accept_offer.asp
+++ b/APPL/MLD/opdr_accept_offer.asp
@@ -58,11 +58,11 @@ user.anything_todo_or_abort(this_opdr.canAcceptOffer); // Mag ik deze kosten afm
   <body class="modal" id="acceptoffertebody">
     <div id="accept">
 <%    // Uitvoerende omschrijving bepalen m.b.v. uitvoerende key
-      sql = "SELECT '" + L("lcl_mld_bedrijf_prefix") + "' ||  b.prs_bedrijf_naam uitv_omschr"
+      sql = "SELECT " + safe.quoted_sql(L("lcl_mld_bedrijf_prefix")) + " ||  b.prs_bedrijf_naam uitv_omschr"
             + " FROM prs_bedrijf b"
             + " WHERE b.prs_bedrijf_key = " + mld_opdr.uitvoerende_key
             + " UNION ALL"
-            + " SELECT '" + L("lcl_mld_person_prefix") + "'||" + S("prs_pers_string") + " uitv_omschr"
+            + " SELECT " + safe.quoted_sql(L("lcl_mld_person_prefix")) + "'||" + S("prs_pers_string") + " uitv_omschr"
             + " FROM prs_perslid p "
             + " WHERE p.prs_perslid_key = " + mld_opdr.uitvoerende_key;
       oRs = Oracle.Execute(sql);
diff --git a/APPL/MLD/opdr_reject.asp b/APPL/MLD/opdr_reject.asp
index 485175f71e..2d704a70f3 100644
--- a/APPL/MLD/opdr_reject.asp
+++ b/APPL/MLD/opdr_reject.asp
@@ -88,11 +88,11 @@ user.anything_todo_or_abort(toberejected > 0); // We klagen niet over enkele wel
         var prefix = mld_opdr.srtdiscprefix;
 
         // Uitvoerende omschrijving bepalen m.b.v. uitvoerende key
-        sql = "SELECT '" + L("lcl_mld_bedrijf_prefix") + "' ||  b.prs_bedrijf_naam uitv_omschr"
+        sql = "SELECT " + safe.quoted_sql(L("lcl_mld_bedrijf_prefix")) + " ||  b.prs_bedrijf_naam uitv_omschr"
               + " FROM prs_bedrijf b"
               + " WHERE b.prs_bedrijf_key = " + uitvoerende_key
               + " UNION ALL"
-              + " SELECT '" + L("lcl_mld_person_prefix") + "'||" + S("prs_pers_string") + " uitv_omschr"
+              + " SELECT " + safe.quoted_sql(L("lcl_mld_person_prefix")) + "||" + S("prs_pers_string") + " uitv_omschr"
               + " FROM prs_perslid p "
               + " WHERE p.prs_perslid_key = " + uitvoerende_key;
         oRs = Oracle.Execute(sql);
diff --git a/APPL/MLD/opdr_reject_offer.asp b/APPL/MLD/opdr_reject_offer.asp
index 2b7e7ad12d..5c30084c05 100644
--- a/APPL/MLD/opdr_reject_offer.asp
+++ b/APPL/MLD/opdr_reject_offer.asp
@@ -85,11 +85,11 @@ var result = { opdr_key: ingesloten.join(","), message: "", success: false };
       lcl.set_dialect(mld_opdr.opdr_type, "MLD_TYPEOPDR_KEY"); // opdr_type van de laatste opdracht genomen
 
       // Uitvoerende omschrijving bepalen m.b.v. uitvoerende key
-      sql = "SELECT '" + L("lcl_mld_bedrijf_prefix") + "' ||  b.prs_bedrijf_naam uitv_omschr"
+      sql = "SELECT " + safe.quoted_sql(L("lcl_mld_bedrijf_prefix")) + " ||  b.prs_bedrijf_naam uitv_omschr"
             + " FROM prs_bedrijf b"
             + " WHERE b.prs_bedrijf_key = " + mld_opdr.uitvoerende_key
             + " UNION ALL"
-            + " SELECT '" + L("lcl_mld_person_prefix") + "'||" + S("prs_pers_string") + " uitv_omschr"
+            + " SELECT " + safe.quoted_sql(L("lcl_mld_person_prefix")) + " ||" + S("prs_pers_string") + " uitv_omschr"
             + " FROM prs_perslid p "
             + " WHERE p.prs_perslid_key = " + mld_opdr.uitvoerende_key;
       oRs = Oracle.Execute(sql);
diff --git a/APPL/Shared/Suggest/SuggestFaq.asp b/APPL/Shared/Suggest/SuggestFaq.asp
index 7130821a33..cbf09b1193 100644
--- a/APPL/Shared/Suggest/SuggestFaq.asp
+++ b/APPL/Shared/Suggest/SuggestFaq.asp
@@ -29,7 +29,7 @@ chars = chars.replace(/\*/g,"%");
 var extraInf = ", 'Extra' extra";
 
 // Check if person is authorized for all accounts
-sql = " SELECT '" + chars + "' zoekstr, to_char(count(*))||' resultaten' n"
+sql = " SELECT " + safe.quoted_sql(chars) + " zoekstr, to_char(count(*))||' resultaten' n"
         + " FROM fac_faq WHERE "
         + (!fronto? " fac_faq_level < 2 AND " : "")
         + fac.createOrClause("UPPER(fac_faq_question)", upperchars)
