check if AMQP_VERSION exists

diff --git a/src/amqp.c b/src/amqp.c
index 3ba8225..97359cf 100644 (file)
--- a/src/amqp.c
+++ b/src/amqp.c
@@ -304,7 +304,7 @@ static int camqp_create_exchange (camqp_config_t *conf) /* {{{ */
             /* type        = */ amqp_cstring_bytes (conf->exchange_type),
             /* passive     = */ 0,
             /* durable     = */ 0,
-#if AMQP_VERSION >= 0x00060000
+#if defined(AMQP_VERSION) && AMQP_VERSION >= 0x00060000
             /* auto delete = */ 0,
             /* internal    = */ 0,
 #endif