diff --git a/lib/format.cpp b/lib/format.cpp
index 0c5b5c5fc..e8ebace97 100644
--- a/lib/format.cpp
+++ b/lib/format.cpp
@@ -79,7 +79,7 @@ void Format::start(SignalList::Ptr sigs, int fl) {
 }
 
 void Format::start(const std::string &dtypes, int fl) {
-  flags |= fl;
+  flags &= fl;
 
   signals = std::make_shared<SignalList>(dtypes.c_str());
   if (!signals)
diff --git a/lib/formats/villas_human.cpp b/lib/formats/villas_human.cpp
index f92835f44..1ae588161 100644
--- a/lib/formats/villas_human.cpp
+++ b/lib/formats/villas_human.cpp
@@ -204,6 +204,6 @@ static char d[] = "VILLAS human readable format";
 static LineFormatPlugin<
     VILLASHumanFormat, n, d,
     (int)SampleFlags::HAS_TS_ORIGIN | (int)SampleFlags::HAS_SEQUENCE |
-        (int)SampleFlags::HAS_DATA | (int)SampleFlags::NEW_FRAME,
+        (int)SampleFlags::HAS_DATA | (int)SampleFlags::NEW_FRAME | (int)SampleFlags::HAS_OFFSET,
     '\n'>
     p;
diff --git a/lib/path.cpp b/lib/path.cpp
index 7a5630ae6..c28ecfe1a 100644
--- a/lib/path.cpp
+++ b/lib/path.cpp
@@ -524,12 +524,12 @@ void Path::start() {
 
   received.reset();
 
-  // We initialize the intial sample
+  // We initialize the initial sample
   last_sample = sample_alloc(&pool);
   if (!last_sample)
     throw MemoryAllocationError();
 
-  last_sample->length = signals->size();
+  last_sample->length = 0;
   last_sample->signals = signals;
   last_sample->ts.origin = time_now();
   last_sample->sequence = 0;