extmod: Add uheapq module.
diff --git a/py/mpconfig.h b/py/mpconfig.h
index 4efe21d..201621e 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -403,6 +403,10 @@
 #define MICROPY_PY_URE (0)
 #endif
 
+#ifndef MICROPY_PY_UHEAPQ
+#define MICROPY_PY_UHEAPQ (0)
+#endif
+
 /*****************************************************************************/
 /* Hooks for a port to add builtins                                          */