diff --git a/lib/dns/dst_internal.h b/lib/dns/dst_internal.h

index 640519a..fc40472 100644

--- a/lib/dns/dst_internal.h

+++ b/lib/dns/dst_internal.h

@@ -59,6 +59,9 @@

 #include <openssl/objects.h>

 #include <openssl/rsa.h>

 #endif

+#if PKCS11CRYPTO

+#include <pk11/pk11.h>

+#endif

 ISC_LANG_BEGINDECLS

diff --git a/lib/isc/include/pk11/internal.h b/lib/isc/include/pk11/internal.h

index aa8907a..603712a 100644

--- a/lib/isc/include/pk11/internal.h

+++ b/lib/isc/include/pk11/internal.h

@@ -13,6 +13,8 @@

 #ifndef PK11_INTERNAL_H

 #define PK11_INTERNAL_H 1

+#include <pk11/pk11.h>

+

 /*! \file pk11/internal.h */

 ISC_LANG_BEGINDECLS