diff --git a/crypto/kdf/hkdf.c b/crypto/kdf/hkdf.c
index 25bf4b729f64c..6d1a32c885ecf 100644
--- a/crypto/kdf/hkdf.c
+++ b/crypto/kdf/hkdf.c
@@ -15,7 +15,7 @@
 #include "internal/cryptlib.h"
 #include "crypto/evp.h"
 
-#define HKDF_MAXBUF 1024
+#define HKDF_MAXBUF 2048
 
 static unsigned char *HKDF(const EVP_MD *evp_md,
                            const unsigned char *salt, size_t salt_len,