diff --git a/proxyprotocol.h b/proxyprotocol.h
index 19523b6..e49b230 100644
--- a/proxyprotocol.h
+++ b/proxyprotocol.h
@@ -13,7 +13,7 @@ int pp_header_len(char* buffer, int len);
 #else /* HAVE_PROXYPROTOCOL */
 
 static inline int pp_write_header(int pp_version, struct connection* cnx) { return 0; }
-static int pp_log_connection(char* buffer, ssize_t buffer_len) { return 0; }
+static inline int pp_log_connection(char* buffer, ssize_t buffer_len) { return 0; }
 static inline int pp_header_len(char*, int) { return 0; }
 
 #endif /* HAVE_PROXYPROTOCOL */