diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c
index 9a9782ab4593..0f2f9f6595de 100644
--- a/sys/net/if_ethersubr.c
+++ b/sys/net/if_ethersubr.c
@@ -59,6 +59,7 @@
 #include <net/if_types.h>
 #include <net/bpf.h>
 #include <net/ethernet.h>
+#include <net/bridgestp.h>
 #include <net/if_bridgevar.h>
 #include <net/if_vlan_var.h>
 
diff --git a/sys/net/if_gif.c b/sys/net/if_gif.c
index 2a640a643bb6..654321ef9934 100644
--- a/sys/net/if_gif.c
+++ b/sys/net/if_gif.c
@@ -81,6 +81,7 @@
 
 #include <netinet/ip_encap.h>
 #include <net/ethernet.h>
+#include <net/bridgestp.h>
 #include <net/if_bridgevar.h>
 #include <net/if_gif.h>