diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..080e70d
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}
diff --git a/Makefile b/Makefile
index f1ffce0..397bc4f 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,7 @@ CFLAGS = \
     -Wno-attributes \
     -I$(FUN_DIR) \
     -I$(SRC_DIR) \
-    -I/usr/include/newlib
+    -I/usr/include/newlib \
     -I$(SRC_DIR)/funconf.h
 
 LD_SCRIPT_IN  = $(FUN_DIR)/ch32fun.ld