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-rw-r--r--sys/dev/uart/uart_if.m1
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/dev/uart/uart_if.m b/sys/dev/uart/uart_if.m
index 0bb1454..bfac071 100644
--- a/sys/dev/uart/uart_if.m
+++ b/sys/dev/uart/uart_if.m
@@ -26,6 +26,7 @@
# $FreeBSD$
#include <sys/param.h>
+#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bus.h>
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