diff --git a/.github/workflows/check-sourcecode.yml b/.github/workflows/check-sourcecode.yml
new file mode 100644
index 00000000..af24346d
--- /dev/null
+++ b/.github/workflows/check-sourcecode.yml
@@ -0,0 +1,24 @@
+name: "Check Sourcecode"
+
+on:
+  push:
+    branches-ignore:
+      - 'onlinedocs'
+  pull_request:
+    branches-ignore:
+      - 'onlinedocs'
+
+jobs:
+
+  check-sourcecode:
+    name: "Check Sourcecode"
+    runs-on: ubuntu-latest
+
+    steps:
+
+      - uses: actions/checkout@v4
+
+      # - name: Install prerequisites
+
+      - name: "Check the sourcecode"
+        run: ./tools/check-sourcecode
diff --git a/tools/check-sourcecode b/tools/check-sourcecode
new file mode 100755
index 00000000..1ae5a8fc
--- /dev/null
+++ b/tools/check-sourcecode
@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+# check-sourcecode -- check the avrdude source code for zombie mistakes
+# Copyright (C) 2024 Hans Ulrich Niedermann <hun@n-dimensional.de>
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+
+set -e
+
+prog="$(basename "$0")"
+cd "$(dirname "$0")"
+cd ..
+test -s README.md
+test -s COPYING
+test -s build.sh
+test -d .git/refs/heads
+
+
+declare -a checks=()
+fail=0
+succ=0
+
+
+checks+=(check_ac_cfg)
+check_ac_cfg() {
+    if git grep -E '#include\s+"ac_cfg\.h"'
+    then
+	echo "Error: Found #include \"ac_cfg.h\" with double quotes \"\". Should be <>."
+	echo "       See https://github.com/avrdudes/avrdude/issues/1706 for details."
+	return 1
+    fi
+}
+
+
+for check in "${checks[@]}"
+do
+    if "$check"; then
+	succ=$(( "$succ" + 1 ))
+	status="SUCC"
+    else
+	fail=$(( "$fail" + 1 ))
+	status="FAIL"
+    fi
+    echo "$status $check"
+done
+total=$(( "$succ" + "$fail" ))
+
+
+echo "$prog: Summary: $fail checks failed, $succ checks succeeded. $total checks in total."
+if [[ "$fail" -gt 0 ]]; then
+    exit 1
+else
+    exit 0
+fi