diff --git a/plugins/gr-limesdr/lib/sink_impl.cc b/plugins/gr-limesdr/lib/sink_impl.cc
index d5019dcd..91f23345 100644
--- a/plugins/gr-limesdr/lib/sink_impl.cc
+++ b/plugins/gr-limesdr/lib/sink_impl.cc
@@ -32,6 +32,9 @@ using namespace std::literals::string_literals;
 
 namespace gr {
 namespace limesdr {
+
+static const pmt::pmt_t TX_TIME_TAG = pmt::string_to_symbol(std::string("tx_time"));
+
 sink::sptr sink::make(std::string serial,
                       int channel_mode,
                       const std::string& filename,
@@ -220,7 +223,7 @@ void sink_impl::work_tags(int noutput_items)
     // Go through the tags
     for (tag_t cTag : tags) {
         // Found tx_time tag
-        if (pmt::eq(cTag.key, TIME_TAG)) {
+        if (pmt::eq(cTag.key, TX_TIME_TAG)) {
             // Convert time to sample timestamp
             uint64_t secs = pmt::to_uint64(pmt::tuple_ref(cTag.value, 0));
             double fracs = pmt::to_double(pmt::tuple_ref(cTag.value, 1));
diff --git a/plugins/gr-limesdr/lib/sink_impl.h b/plugins/gr-limesdr/lib/sink_impl.h
index 1cea01ce..de0f6ab3 100644
--- a/plugins/gr-limesdr/lib/sink_impl.h
+++ b/plugins/gr-limesdr/lib/sink_impl.h
@@ -26,8 +26,6 @@
 #include <array>
 #include <string>
 
-static const pmt::pmt_t TIME_TAG = pmt::string_to_symbol(std::string("tx_time"));
-
 namespace gr {
 namespace limesdr {
 class sink_impl : public sink
diff --git a/plugins/gr-limesdr/lib/source_impl.cc b/plugins/gr-limesdr/lib/source_impl.cc
index fc05722c..f956f73e 100644
--- a/plugins/gr-limesdr/lib/source_impl.cc
+++ b/plugins/gr-limesdr/lib/source_impl.cc
@@ -32,6 +32,8 @@ using namespace std::literals::string_literals;
 namespace gr {
 namespace limesdr {
 
+static const pmt::pmt_t RX_TIME_TAG = pmt::string_to_symbol(std::string("rx_time"));
+
 source::sptr source::make(std::string serial,
                           int channel_mode,
                           const std::string& filename,
@@ -273,7 +275,7 @@ void source_impl::add_time_tag(int channel, lime::StreamMeta meta)
     const pmt::pmt_t ID = pmt::string_to_symbol(stored.serial);
     const pmt::pmt_t t_val =
         pmt::make_tuple(pmt::from_uint64(intpart), pmt::from_double(fracpart));
-    add_item_tag(channel, nitems_written(channel), TIME_TAG, t_val, ID);
+    add_item_tag(channel, nitems_written(channel), RX_TIME_TAG, t_val, ID);
 }
 
 // Return io_signature to manage module output count