diff --git a/lib/packet_dropper_impl.h b/lib/packet_dropper_impl.h
index f91b641..0c81ddc 100644
--- a/lib/packet_dropper_impl.h
+++ b/lib/packet_dropper_impl.h
@@ -19,6 +19,7 @@
 #define INCLUDED_FOO_PACKET_DROPPER_IMPL_H
 
 #include <foo/packet_dropper.h>
+#include <random>
 
 namespace gr {
 namespace foo {