diff --git a/bindings/objc/objcrtl10.pas b/bindings/objc/objcrtl10.pas
index b8de1da5d..cbb9f105e 100644
--- a/bindings/objc/objcrtl10.pas
+++ b/bindings/objc/objcrtl10.pas
@@ -7,6 +7,7 @@
  headers included with XCode 3.1.2
  The original copyright note of is kept on each include file
 }
+{$DEFINE DEBUG}
 
 unit objcrtl10;
 
@@ -521,10 +522,31 @@ end;
 function class_addMethod10(cls:_Class; name:SEL; _imp:IMP; types:pchar):BOOL; cdecl;
 begin
   if not Assigned(cls) or not Assigned(name) or not Assigned(_imp) or not Assigned(types) then begin
+    {$IFDEF DEBUG}
+    write('* Bad params?: cls  = ', Integer(cls));
+    write(' name = ', PChar(name));
+    write(' imp  = ', Integer(_imp));
+    writeln(' type = ', types);
+    {$ENDIF}
     Result := false;
     Exit;
   end;
+
+  {$IFDEF DEBUG}
+  write('* method list = ', Integer(_Class1(cls)^.methodLists));
+  if Assigned (TClassMethod1Reg(_Class1(cls)^.methodLists)) then
+    writeln(', ', TClassMethod1Reg(_Class1(cls)^.methodLists).ClassName)
+  else
+    writeln;
+  try
+  {$ENDIF}
   TClassMethod1Reg(_Class1(cls)^.methodLists).AddMethod(name, _imp, types);
+  {$IFDEF DEBUG}
+    writeln('"',PChar(name), '" added successfully');
+  except
+    writeln('* exception while adding method');
+  end;
+  {$ENDIF}
   Result := true;
 end;
 
diff --git a/bindings/objc/objcrtltest.pas b/bindings/objc/objcrtltest.pas
index 8e9e9603f..f584f4833 100644
--- a/bindings/objc/objcrtltest.pas
+++ b/bindings/objc/objcrtltest.pas
@@ -54,7 +54,7 @@ const
   newMethod4Enc = 'f@:';
 
   newMethod5 = 'getSmallRecord';
-  newMethod5Enc = '{TSmallRecord=ccc}@:';
+  newMethod5Enc = '{TSmallRecord=cccc{TSubStructure=cccc}}@:';
 
   varName  = 'myvar';
 
@@ -105,11 +105,13 @@ begin
        class_addMethod(cl, selector(newMethod1), @imp_newMethod1, newMethod1Enc) and
        class_addMethod(cl, selector(newMethod2), @imp_newMethod2, newMethod2Enc) and
        class_addMethod(cl, selector(newMethod3), @imp_newMethod3, newMethod3Enc) and
-       class_addMethod(cl, selector(newMethod4), @imp_newMethod4, newMethod4Enc);
+       class_addMethod(cl, selector(newMethod4), @imp_newMethod4, newMethod4Enc) and
        class_addMethod(cl, selector(newMethod5), @imp_getSmallRec, newMethod5Enc);
-  if not b then writeln('failed to add/override some method(s)');
+  if not b then
+    writeln('failed to add/override some method(s)');
 
-  class_addIvar(cl, varName, sizeof(TObject), 1, _C_PASOBJ);
+  if not class_addIvar(cl, varName, sizeof(TObject), 1, _C_PASOBJ) then
+    writeln('failed to add variable ', varName);
 
   objc_registerClassPair(cl);
 end;