diff --git a/.gitattributes b/.gitattributes
index 8ef735a518..1576393edf 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -8045,6 +8045,7 @@ tests/webtbs/tw6641.pp svneol=native#text/plain
 tests/webtbs/tw6684.pp svneol=native#text/plain
 tests/webtbs/tw6686.pp svneol=native#text/plain
 tests/webtbs/tw6687.pp svneol=native#text/plain
+tests/webtbs/tw6690.pp svneol=native#text/plain
 tests/webtbs/tw6700.pp svneol=native#text/plain
 tests/webtbs/tw6735.pp svneol=native#text/plain
 tests/webtbs/tw6742.pp svneol=native#text/plain
diff --git a/compiler/pdecobj.pas b/compiler/pdecobj.pas
index f200ca0cfe..9301f8d480 100644
--- a/compiler/pdecobj.pas
+++ b/compiler/pdecobj.pas
@@ -420,8 +420,12 @@ implementation
                          end;
                      odt_interfacecorba,
                      odt_interfacecom:
-                       if not(is_interface(childof)) then
-                         Message(parser_e_mix_of_classes_and_objects);
+                       begin
+                         if not(is_interface(childof)) then
+                           Message(parser_e_mix_of_classes_and_objects);
+                         classtype:=childof.objecttype;
+                         aktobjectdef.objecttype:=classtype;
+                       end;
                      odt_cppclass:
                        if not(is_cppclass(childof)) then
                          Message(parser_e_mix_of_classes_and_objects);
diff --git a/tests/webtbs/tw6690.pp b/tests/webtbs/tw6690.pp
new file mode 100644
index 0000000000..3dc1c443ec
--- /dev/null
+++ b/tests/webtbs/tw6690.pp
@@ -0,0 +1,76 @@
+program inheritedcorba;
+{$mode objfpc}{$h+}
+uses
+ typinfo;
+
+type
+ {$interfaces corba}
+ iinterface1 = interface
+  procedure proc1;
+ end;
+ {$interfaces com}
+ iinterface2 = interface
+  procedure proc2;
+ end;
+
+ iinterface3 = interface(iinterface1)
+  procedure proc3;
+ end;
+ iinterface4 = interface(iinterface2)
+  procedure proc4;
+ end;
+
+ {$interfaces corba}
+ iinterface5 = interface(iinterface1)
+  procedure proc5;
+ end;
+ iinterface6 = interface(iinterface2)
+  procedure proc6;
+ end;
+
+ tclass1 = class(iinterface1)
+  public
+   procedure proc1;
+ end;
+
+{tclass6 = class(iinterface6)
+  public
+   procedure proc6;
+ end;
+}
+{ does not compile because it is com style interface:
+ inheritedcorba.pas(36,12) Error: No matching implementation for
+ interface method "IUnknown.QueryInterface(const TGuid,out <Formal type>):
+  LongInt;StdCall" found  ...
+}
+procedure writeinterfacetype(po: ptypeinfo);
+begin
+ case po^.kind of
+  tkinterfaceraw: if (po^.name<>'iinterface1') and
+                  (po^.name<>'iinterface3') and
+                  (po^.name<>'iinterface5') then
+                  halt(1);
+  tkinterface: if (po^.name<>'iinterface2') and
+                  (po^.name<>'iinterface4') and
+                  (po^.name<>'iinterface6') then
+                  halt(1);
+  else
+    halt(1);
+ end;
+end;
+
+{ tclass1 }
+
+procedure tclass1.proc1;
+begin
+end;
+
+begin
+ writeinterfacetype(typeinfo(iinterface1));
+ writeinterfacetype(typeinfo(iinterface2));
+ writeinterfacetype(typeinfo(iinterface3));
+ writeinterfacetype(typeinfo(iinterface4));
+ writeinterfacetype(typeinfo(iinterface5));
+ writeinterfacetype(typeinfo(iinterface6));
+ writeln('ok');
+end.