diff --git a/src/fuzz/fuzz-nspawn-oci.options b/src/fuzz/fuzz-nspawn-oci.options
new file mode 100644
index 0000000000..678d526b1e
--- /dev/null
+++ b/src/fuzz/fuzz-nspawn-oci.options
@@ -0,0 +1,2 @@
+[libfuzzer]
+max_len = 65536
diff --git a/src/fuzz/fuzz-nspawn-settings.options b/src/fuzz/fuzz-nspawn-settings.options
new file mode 100644
index 0000000000..678d526b1e
--- /dev/null
+++ b/src/fuzz/fuzz-nspawn-settings.options
@@ -0,0 +1,2 @@
+[libfuzzer]
+max_len = 65536
diff --git a/src/fuzz/fuzz-udev-rules.options b/src/fuzz/fuzz-udev-rules.options
new file mode 100644
index 0000000000..678d526b1e
--- /dev/null
+++ b/src/fuzz/fuzz-udev-rules.options
@@ -0,0 +1,2 @@
+[libfuzzer]
+max_len = 65536
diff --git a/src/fuzz/fuzz-unit-file.options b/src/fuzz/fuzz-unit-file.options
new file mode 100644
index 0000000000..678d526b1e
--- /dev/null
+++ b/src/fuzz/fuzz-unit-file.options
@@ -0,0 +1,2 @@
+[libfuzzer]
+max_len = 65536