Use of Enum without previous declaration

I'm trying to compile the following on Linux GCC:

bool hasProperty(enum ITEMPROPERTY prop) const;

This declaration is in a header file. This header file also includes another header which has ITEMPROPERTY declared and implemented:

enum ITEMPROPERTY { HOPE_MODERATION_FIND_THIS_CLEAR_ENOUGH = 0 }

Following error occurs:

Use of Enum 'ITEMPROPERTY' without previous declaration

It won't happen when compiling using Visual Studio 2015. (vc140 toolset).

What could it be? I just updated my GCC to 6.3.0 and the problem remains.

No namespaces are being used in this code.