diff --git a/src/crypto/crypto.h b/src/crypto/crypto.h
index 440da0302..7c7515f6b 100644
--- a/src/crypto/crypto.h
+++ b/src/crypto/crypto.h
@@ -916,5 +916,6 @@ struct wpabuf * crypto_ecdh_get_pubkey(struct crypto_ecdh *ecdh, int inc_y);
 struct wpabuf * crypto_ecdh_set_peerkey(struct crypto_ecdh *ecdh, int inc_y,
 					const u8 *key, size_t len);
 void crypto_ecdh_deinit(struct crypto_ecdh *ecdh);
+size_t crypto_ecdh_prime_len(struct crypto_ecdh *ecdh);
 
 #endif /* CRYPTO_H */
diff --git a/src/crypto/crypto_openssl.c b/src/crypto/crypto_openssl.c
index 783b293e9..47b6ebbd6 100644
--- a/src/crypto/crypto_openssl.c
+++ b/src/crypto/crypto_openssl.c
@@ -2168,4 +2168,10 @@ void crypto_ecdh_deinit(struct crypto_ecdh *ecdh)
 	}
 }
 
+
+size_t crypto_ecdh_prime_len(struct crypto_ecdh *ecdh)
+{
+	return crypto_ec_prime_len(ecdh->ec);
+}
+
 #endif /* CONFIG_ECC */
diff --git a/src/crypto/crypto_wolfssl.c b/src/crypto/crypto_wolfssl.c
index 85ce565bd..dc68bd651 100644
--- a/src/crypto/crypto_wolfssl.c
+++ b/src/crypto/crypto_wolfssl.c
@@ -1834,4 +1834,10 @@ fail:
 	goto done;
 }
 
+
+size_t crypto_ecdh_prime_len(struct crypto_ecdh *ecdh)
+{
+	return crypto_ec_prime_len(ecdh->ec);
+}
+
 #endif /* CONFIG_ECC */