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-rw-r--r--ifstat.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ifstat.c b/ifstat.c
index ecd09e0..73d12a7 100644
--- a/ifstat.c
+++ b/ifstat.c
@@ -60,6 +60,7 @@ int if_init(char *ifname) {
int if_stat(void) {
struct ifnet ifnet;
+ extern struct ifdata ifdata;
if (kvm_read(kvmd, (unsigned long)addr, &ifnet, sizeof(ifnet)) != sizeof(ifnet))
error(kvm_geterr(kvmd));