diff --git a/src_plugin_sdk/CHANGELOG.md b/src_plugin_sdk/CHANGELOG.md
index f0bbbe9..a1c0f99 100644
--- a/src_plugin_sdk/CHANGELOG.md
+++ b/src_plugin_sdk/CHANGELOG.md
@@ -5,11 +5,13 @@
 | :rotating_light:     | Breaks build                  |
 | :warning:            | Breaks compatibility with app |
 
-## [latest](/) - 2023/12/06
+## [latest](/) - 2023/12/07
 
 ### Fixed
 
 * standard\_plugin build ([this PR on the SDK](https://github.com/LedgerHQ/ledger-secure-sdk/pull/473) had broken it)
+* Broken variant auto-setting in the standard\_plugin Makefile
+* Missing null-check on parameters received by the plugins
 
 ### Changed
 
diff --git a/src_plugin_sdk/main.c b/src_plugin_sdk/main.c
index f06a2bb..b36171f 100644
--- a/src_plugin_sdk/main.c
+++ b/src_plugin_sdk/main.c
@@ -53,28 +53,32 @@ static void call_app_ethereum() {
 
 // Function to dispatch calls from the ethereum app.
 static void dispatch_call(int message, void *parameters) {
-    switch (message) {
-        case ETH_PLUGIN_INIT_CONTRACT:
-            handle_init_contract(parameters);
-            break;
-        case ETH_PLUGIN_PROVIDE_PARAMETER:
-            handle_provide_parameter(parameters);
-            break;
-        case ETH_PLUGIN_FINALIZE:
-            handle_finalize(parameters);
-            break;
-        case ETH_PLUGIN_PROVIDE_INFO:
-            handle_provide_token(parameters);
-            break;
-        case ETH_PLUGIN_QUERY_CONTRACT_ID:
-            handle_query_contract_id(parameters);
-            break;
-        case ETH_PLUGIN_QUERY_CONTRACT_UI:
-            handle_query_contract_ui(parameters);
-            break;
-        default:
-            PRINTF("Unhandled message %d\n", message);
-            break;
+    if (parameters != NULL) {
+        switch (message) {
+            case ETH_PLUGIN_INIT_CONTRACT:
+                handle_init_contract(parameters);
+                break;
+            case ETH_PLUGIN_PROVIDE_PARAMETER:
+                handle_provide_parameter(parameters);
+                break;
+            case ETH_PLUGIN_FINALIZE:
+                handle_finalize(parameters);
+                break;
+            case ETH_PLUGIN_PROVIDE_INFO:
+                handle_provide_token(parameters);
+                break;
+            case ETH_PLUGIN_QUERY_CONTRACT_ID:
+                handle_query_contract_id(parameters);
+                break;
+            case ETH_PLUGIN_QUERY_CONTRACT_UI:
+                handle_query_contract_ui(parameters);
+                break;
+            default:
+                PRINTF("Unhandled message %d\n", message);
+                break;
+        }
+    } else {
+        PRINTF("Received null parameters\n");
     }
 }
 
diff --git a/src_plugin_sdk/standard_plugin.mk b/src_plugin_sdk/standard_plugin.mk
index 0fd12d1..5409d29 100644
--- a/src_plugin_sdk/standard_plugin.mk
+++ b/src_plugin_sdk/standard_plugin.mk
@@ -48,7 +48,7 @@ CURVE_APP_LOAD_PARAMS = secp256k1
 PATH_APP_LOAD_PARAMS ?= "44'/60'"
 
 VARIANT_PARAM = COIN
-VARIANTS_VALUES ?= $(NORMAL_NAME)
+VARIANT_VALUES ?= $(NORMAL_NAME)
 
 HAVE_APPLICATION_FLAG_LIBRARY = 1