diff --git a/accel-pppd/shaper/tc_core.h b/accel-pppd/shaper/tc_core.h
index cb85cc4..e38b579 100644
--- a/accel-pppd/shaper/tc_core.h
+++ b/accel-pppd/shaper/tc_core.h
@@ -6,6 +6,10 @@

 #define TIME_UNITS_PER_SEC     1000000

+#ifndef UINT16_MAX
+#define UINT16_MAX 65535
+#endif
+
 enum link_layer {
        LINKLAYER_UNSPEC,
        LINKLAYER_ETHERNET,