diff --git a/src/posix/i_system.h b/src/posix/i_system.h
index 80b9e55ef..9b29185a3 100644
--- a/src/posix/i_system.h
+++ b/src/posix/i_system.h
@@ -158,6 +158,7 @@ private:
 	friend int I_FindNext(void *handle, findstate_t *fileinfo);
 	friend const char *I_FindName(findstate_t *fileinfo);
 	friend int I_FindAttr(findstate_t *fileinfo);
+	friend int I_FindClose(void *handle);
 };
 
 void *I_FindFirst (const char *filespec, findstate_t *fileinfo);