diff --git a/lib/packet.cc b/lib/packet.cc
index 09e0c09e100376ba1f25ca1c3d2179022f005a0e..0214132a72f84c5f33be9ddcb7b61ebaf8d59412 100644
--- a/lib/packet.cc
+++ b/lib/packet.cc
@@ -1156,7 +1156,7 @@ Packet::clone(bool fast)
 #endif /* CLICK_LINUXMODULE */
 }
 
-inline WritablePacket *
+WritablePacket *
 Packet::duplicate(int32_t extra_headroom, int32_t extra_tailroom)
 {
 #if CLICK_PACKET_USE_DPDK