diff --git a/providers/implementations/macs/blake2_mac_impl.c b/providers/implementations/macs/blake2_mac_impl.c
index 35a162246e..e1ffa04bfd 100644
--- a/providers/implementations/macs/blake2_mac_impl.c
+++ b/providers/implementations/macs/blake2_mac_impl.c
@@ -185,6 +185,9 @@ static int blake2_mac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
     struct blake2_mac_data_st *macctx = vmacctx;
     const OSSL_PARAM *p;
 
+    if (params == NULL)
+        return 1;
+
     if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
         size_t size;
 
diff --git a/providers/implementations/macs/cmac_prov.c b/providers/implementations/macs/cmac_prov.c
index 9807799fe0..0795c245a7 100644
--- a/providers/implementations/macs/cmac_prov.c
+++ b/providers/implementations/macs/cmac_prov.c
@@ -184,6 +184,9 @@ static int cmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
     OSSL_LIB_CTX *ctx = PROV_LIBCTX_OF(macctx->provctx);
     const OSSL_PARAM *p;
 
+    if (params == NULL)
+        return 1;
+
     if (!ossl_prov_cipher_load_from_params(&macctx->cipher, params, ctx))
         return 0;
 
diff --git a/providers/implementations/macs/hmac_prov.c b/providers/implementations/macs/hmac_prov.c
index 7188232d7d..f291e574ca 100644
--- a/providers/implementations/macs/hmac_prov.c
+++ b/providers/implementations/macs/hmac_prov.c
@@ -294,6 +294,9 @@ static int hmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
     const OSSL_PARAM *p;
     int flags = 0;
 
+    if (params == NULL)
+        return 1;
+
     if (!ossl_prov_digest_load_from_params(&macctx->digest, params, ctx))
         return 0;
 
diff --git a/providers/implementations/macs/kmac_prov.c b/providers/implementations/macs/kmac_prov.c
index 361ff8e716..8735705f1b 100644
--- a/providers/implementations/macs/kmac_prov.c
+++ b/providers/implementations/macs/kmac_prov.c
@@ -379,6 +379,9 @@ static int kmac_set_ctx_params(void *vmacctx, const OSSL_PARAM *params)
     struct kmac_data_st *kctx = vmacctx;
     const OSSL_PARAM *p;
 
+    if (params == NULL)
+        return 1;
+
     if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_XOF)) != NULL
         && !OSSL_PARAM_get_int(p, &kctx->xof_mode))
         return 0;
diff --git a/providers/implementations/macs/siphash_prov.c b/providers/implementations/macs/siphash_prov.c
index 3f2e3267e0..0181d68ed1 100644
--- a/providers/implementations/macs/siphash_prov.c
+++ b/providers/implementations/macs/siphash_prov.c
@@ -195,6 +195,9 @@ static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params)
     const OSSL_PARAM *p = NULL;
     size_t size;
 
+    if (params == NULL)
+        return 1;
+
     if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
         if (!OSSL_PARAM_get_size_t(p, &size)
             || !SipHash_set_hash_size(&ctx->siphash, size))