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-rw-r--r--ext/libnatpmp/getgateway.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/libnatpmp/getgateway.c b/ext/libnatpmp/getgateway.c
index 7f314152..f743a089 100644
--- a/ext/libnatpmp/getgateway.c
+++ b/ext/libnatpmp/getgateway.c
@@ -53,6 +53,7 @@ POSSIBILITY OF SUCH DAMAGE.
#undef USE_PROC_NET_ROUTE
#define USE_SOCKET_ROUTE
#undef USE_SYSCTL_NET_ROUTE
+#include <sys/sysctl.h>
#endif
#ifdef __APPLE__