diff --git a/providers/implementations/kdfs/kbkdf.c b/providers/implementations/kdfs/kbkdf.c
index aa3df15bc7..b99541d5b6 100644
--- a/providers/implementations/kdfs/kbkdf.c
+++ b/providers/implementations/kdfs/kbkdf.c
@@ -366,7 +366,8 @@ static int kbkdf_set_ctx_params(void *vctx, const OSSL_PARAM params[])
     if (!ossl_prov_macctx_load_from_params(&ctx->ctx_init, params, NULL,
                                            NULL, NULL, libctx))
         return 0;
-    else if (ctx->ctx_init != NULL) {
+    if (ctx->ctx_init != NULL) {
+        ctx->is_kmac = 0;
         if (EVP_MAC_is_a(EVP_MAC_CTX_get0_mac(ctx->ctx_init),
                          OSSL_MAC_NAME_KMAC128)
             || EVP_MAC_is_a(EVP_MAC_CTX_get0_mac(ctx->ctx_init),