diff --git a/crypto/dh.c b/crypto/dh.c
index e151f12775ca..b1032a5c1bfa 100644
--- a/crypto/dh.c
+++ b/crypto/dh.c
@@ -147,7 +147,7 @@ static int dh_compute_value(struct kpp_request *req)
 	return ret;
 }
 
-static int dh_max_size(struct crypto_kpp *tfm)
+static unsigned int dh_max_size(struct crypto_kpp *tfm)
 {
 	struct dh_ctx *ctx = dh_get_ctx(tfm);