diff --git a/src/crypto/crypt_aes.c b/src/crypto/crypt_aes.c
index 4d7f6e5c4..77c351700 100644
--- a/src/crypto/crypt_aes.c
+++ b/src/crypto/crypt_aes.c
@@ -35,6 +35,7 @@
  * John Skodon <skodonj@webquill.com>
  */
 
+#include "config.h"
 #include "config_unix.h"
 #include "config_win32.h"
 #include "debug.h"
diff --git a/src/crypto/crypt_aes_impl.c b/src/crypto/crypt_aes_impl.c
index 3fce220f6..7a41992ed 100644
--- a/src/crypto/crypt_aes_impl.c
+++ b/src/crypto/crypt_aes_impl.c
@@ -24,6 +24,7 @@
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "config.h"
 #include "config_unix.h"
 #include "config_win32.h"
 #include "debug.h"