diff --git a/src/lib-dcrypt/dcrypt-openssl.c b/src/lib-dcrypt/dcrypt-openssl.c
index c2dbd30..201ab40 100644
--- a/src/lib-dcrypt/dcrypt-openssl.c
+++ b/src/lib-dcrypt/dcrypt-openssl.c
@@ -20,6 +20,7 @@
 #include <openssl/engine.h>
 #include <openssl/hmac.h>
 #include <openssl/objects.h>
+#include <openssl/bn.h>
 #include "dcrypt.h"
 #include "dcrypt-private.h"
 
diff --git a/src/lib-ssl-iostream/iostream-openssl-context.c b/src/lib-ssl-iostream/iostream-openssl-context.c
index e3c902e..ad6a9c1 100644
--- a/src/lib-ssl-iostream/iostream-openssl-context.c
+++ b/src/lib-ssl-iostream/iostream-openssl-context.c
@@ -6,6 +6,9 @@
 #include "dovecot-openssl-common.h"
 
 #include <openssl/crypto.h>
+#include <openssl/rsa.h>
+#include <openssl/dh.h>
+#include <openssl/bn.h>
 #include <openssl/x509.h>
 #include <openssl/pem.h>
 #include <openssl/ssl.h>