diff --git a/platformio/boards/ststm32.json b/platformio/boards/ststm32.json
index a2746070..5840029c 100644
--- a/platformio/boards/ststm32.json
+++ b/platformio/boards/ststm32.json
@@ -541,5 +541,21 @@
         },
         "url": "https://developer.mbed.org/platforms/ST-Nucleo-L476RG/",
         "vendor": "ST"
+    },
+    "seeedArchMax": {
+        "build": {
+            "f_cpu": "168000000L",
+            "cpu": "cortex-m4",
+            "mcu": "stm32f407vet6"
+        },
+        "frameworks": ["mbed"],
+        "name": "SeeedStudio Arch Max",
+        "platform": "ststm32",
+        "upload": {
+            "maximum_ram_size": 196608,
+            "maximum_size": 524288
+        },
+        "url": "https://developer.mbed.org/platforms/Seeed-Arch-Max/",
+        "vendor": "SeeedStudio"
     }
 }
diff --git a/platformio/builder/scripts/frameworks/mbed.py b/platformio/builder/scripts/frameworks/mbed.py
index cb97a4c5..c80dc5a8 100644
--- a/platformio/builder/scripts/frameworks/mbed.py
+++ b/platformio/builder/scripts/frameworks/mbed.py
@@ -49,6 +49,7 @@ MBED_VARIANTS = {
     "blueboard_lpc11u24": "LPC11U24",
     "dipcortexm0": "LPC11U24",
     "seeeduinoArchPro": "ARCH_PRO",
+    "seeedArchMax": "ARCH_MAX",
     "ubloxc027": "UBLOX_C027",
     "lpc1114fn28": "LPC1114",
     "lpc11u35": "LPC11U35_401",
@@ -266,7 +267,7 @@ env.Append(
 # Target: Build mbed Library
 #
 
-libs = [l for l in eixdata.get("STDLIBS", []) if l not in env.get("LIBS")]
+libs = [l for l in eixdata.get("STDLIBS", []) if l not in env.get("LIBS", [])]
 libs.extend(["mbed", "c", "gcc"])
 
 libs.append(env.Library(