diff --git a/compiler/ogrel.pas b/compiler/ogrel.pas
index 6fb2f1934a..1ce2983a90 100644
--- a/compiler/ogrel.pas
+++ b/compiler/ogrel.pas
@@ -100,6 +100,7 @@ interface
 
       TRelObjInput = class(TObjInput)
       public
+        constructor create;override;
         function ReadObjData(AReader:TObjectreader;out Data:TObjData):boolean;override;
         class function CanReadObjData(AReader:TObjectreader):boolean;override;
       end;
@@ -534,6 +535,12 @@ implementation
                                 TRelObjInput
 *****************************************************************************}
 
+    constructor TRelObjInput.create;
+      begin
+        inherited create;
+        cobjdata:=TRelObjData;
+      end;
+
     function TRelObjInput.ReadObjData(AReader: TObjectreader; out Data: TObjData): boolean;
       begin
         result:=false;