1 files changed, 1 insertions, 1 deletions

diff --git a/auto_tests/onion_test.c b/auto_tests/onion_test.c
index 6cd06494..20c7ff86 100644
--- a/auto_tests/onion_test.c
+++ b/auto_tests/onion_test.c
@@ -17,7 +17,7 @@
 #define USE_IPV6 1
 #endif
 
-static inline IP get_loopback()
+static inline IP get_loopback(void)
 {
     IP ip;
 #if USE_IPV6