diff --git a/bjm.c b/bjm.c
index b9ebd5a..586da53 100644
--- a/bjm.c
+++ b/bjm.c
@@ -42,6 +42,7 @@
 #include <sys/user.h>
 #include <sys/syscall.h>
 #include <signal.h>
+#include <linux/linkage.h>
 
 /* Bits of module.flags.  */