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-rw-r--r--src/vnet/ip/ping.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vnet/ip/ping.h b/src/vnet/ip/ping.h
index b1b71f685fe..3f7488fbeac 100644
--- a/src/vnet/ip/ping.h
+++ b/src/vnet/ip/ping.h
@@ -56,7 +56,7 @@ typedef struct ping_main_t
ping_run_t *ping_run_by_icmp_id;
} ping_main_t;
-ping_main_t ping_main;
+extern ping_main_t ping_main;
#define PING_DEFAULT_DATA_LEN 60
#define PING_DEFAULT_INTERVAL 1.0