diff --git a/src/lazy_bdecode.cpp b/src/lazy_bdecode.cpp
index e6e8e4735..7861a9619 100644
--- a/src/lazy_bdecode.cpp
+++ b/src/lazy_bdecode.cpp
@@ -30,6 +30,7 @@ POSSIBILITY OF SUCH DAMAGE.
 
 */
 
+#include "libtorrent/config.hpp"
 #include "libtorrent/lazy_entry.hpp"
 #include <cstring>