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-rw-r--r--sys/netgraph/netgraph.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/netgraph/netgraph.h b/sys/netgraph/netgraph.h
index 27278b33d336..c1f03ce8686b 100644
--- a/sys/netgraph/netgraph.h
+++ b/sys/netgraph/netgraph.h
@@ -47,6 +47,7 @@
#endif
#include <sys/queue.h>
+#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>