diff --git a/sas/sasjs/services/approvers/gethistory.sas b/sas/sasjs/services/approvers/gethistory.sas
index 65c79e7..fb454f1 100644
--- a/sas/sasjs/services/approvers/gethistory.sas
+++ b/sas/sasjs/services/approvers/gethistory.sas
@@ -159,7 +159,7 @@ run;
   ,msg=%str(syscc=&syscc)
 )
 %webout(OPEN)
-%webout(OBJ,fromSAS)
+%webout(OBJ,fromSAS,missing=STRING)
 %webout(OBJ,histparams)
 %webout(CLOSE)
 
diff --git a/sas/sasjs/services/editors/getdata.sas b/sas/sasjs/services/editors/getdata.sas
index a5d972f..15e7995 100755
--- a/sas/sasjs/services/editors/getdata.sas
+++ b/sas/sasjs/services/editors/getdata.sas
@@ -687,7 +687,7 @@ run;
 %webout(OPEN)
 %webout(OBJ,approvers)
 %webout(OBJ,cols)
-%webout(OBJ,dqdata)
+%webout(OBJ,dqdata,missing=STRING)
 %webout(OBJ,dqrules)
 %webout(OBJ,dsmeta)
 %webout(OBJ,maxvarlengths)
diff --git a/sas/sasjs/services/public/getchangeinfo.sas b/sas/sasjs/services/public/getchangeinfo.sas
index 6478f38..c512a44 100644
--- a/sas/sasjs/services/public/getchangeinfo.sas
+++ b/sas/sasjs/services/public/getchangeinfo.sas
@@ -74,7 +74,7 @@ run;
 )
 
 %webout(OPEN)
-%webout(OBJ,jsParams)
+%webout(OBJ,jsParams,missing=STRING)
 %webout(CLOSE)