diff --git a/src/pcq_encrypt.c b/src/pcq_encrypt.c
index 798e38c..5db7ad8 100644
--- a/src/pcq_encrypt.c
+++ b/src/pcq_encrypt.c
@@ -18,3 +18,5 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA  02110-1301  USA
  */
+
+#include "pcq_encrypt.h"
diff --git a/src/pcq_encrypt.h b/src/pcq_encrypt.h
index 798e38c..22df6d0 100644
--- a/src/pcq_encrypt.h
+++ b/src/pcq_encrypt.h
@@ -18,3 +18,11 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA  02110-1301  USA
  */
+
+#ifndef PCQ_ENCRYPT_H
+#define PCQ_ENCRYPT_H
+
+#include <tommath.h>
+#include <tompoly.h>
+
+#endif