diff --git a/src/assert.cpp b/src/assert.cpp
index a8ab96a19..7f8c67d31 100644
--- a/src/assert.cpp
+++ b/src/assert.cpp
@@ -30,7 +30,7 @@ POSSIBILITY OF SUCH DAMAGE.
 
 */
 
-#ifdef TORRENT_DEBUG
+#if defined TORRENT_DEBUG || defined TORRENT_ASIO_DEBUGGING
 
 #ifdef __APPLE__
 #include <AvailabilityMacros.h>