diff --git a/lib/hcrypto/dh.h b/lib/hcrypto/dh.h
index 87a201753..d4c2a0397 100644
--- a/lib/hcrypto/dh.h
+++ b/lib/hcrypto/dh.h
@@ -57,6 +57,7 @@
 #define DH_check_pubkey hc_DH_check_pubkey
 #define DH_generate_key hc_DH_generate_key
 #define DH_compute_key hc_DH_compute_key
+#define	i2d_DHparams hc_i2d_DHparams
 
 /*
  *
@@ -139,5 +140,7 @@ int	DH_check_pubkey(const DH *, const BIGNUM *, int *);
 int	DH_generate_key(DH *);
 int	DH_compute_key(unsigned char *,const BIGNUM *,DH *);
 
+int	i2d_DHparams(DH *, const char **);
+
 #endif /* _HEIM_DH_H */