diff --git a/include/smolrtsp/nal_transport.h b/include/smolrtsp/nal_transport.h
index 271dbb2..6e68be6 100644
--- a/include/smolrtsp/nal_transport.h
+++ b/include/smolrtsp/nal_transport.h
@@ -42,11 +42,6 @@ typedef struct {
      * The maximum size of an H.265 NAL unit (including the header).
      */
     size_t max_h265_nalu_size;
-
-    /**
-     * The encoder uses slice segments.
-     */
-    bool is_coded_slice;
 } SmolRTSP_NalTransportConfig;
 
 /**
@@ -56,7 +51,6 @@ typedef struct {
  *
  *  - `max_h264_nalu_size` is #SMOLRTSP_MAX_H264_NALU_SIZE.
  *  - `max_h265_nalu_size` is #SMOLRTSP_MAX_H265_NALU_SIZE.
- *  - `is_coded_slice` is `false`.
  */
 SmolRTSP_NalTransportConfig
 SmolRTSP_NalTransportConfig_default(void) SMOLRTSP_PRIV_MUST_USE;
diff --git a/src/nal_transport.c b/src/nal_transport.c
index 0fbc226..8ac25a7 100644
--- a/src/nal_transport.c
+++ b/src/nal_transport.c
@@ -10,7 +10,7 @@
 
 static int send_fragmentized_nal_data(
     SmolRTSP_RtpTransport *t, SmolRTSP_RtpTimestamp ts, size_t max_packet_size,
-    SmolRTSP_NalUnit nalu, bool is_coded_slice);
+    SmolRTSP_NalUnit nalu);
 static int send_fu(
     SmolRTSP_RtpTransport *t, SmolRTSP_RtpTimestamp ts, SmolRTSP_NalUnit fu,
     bool is_first_fragment, bool is_last_fragment);
@@ -19,7 +19,6 @@ SmolRTSP_NalTransportConfig SmolRTSP_NalTransportConfig_default(void) {
     return (SmolRTSP_NalTransportConfig){
         .max_h264_nalu_size = SMOLRTSP_MAX_H264_NALU_SIZE,
         .max_h265_nalu_size = SMOLRTSP_MAX_H265_NALU_SIZE,
-        .is_coded_slice = false,
     };
 }
 
@@ -89,15 +88,14 @@ int SmolRTSP_NalTransport_send_packet(
     }
 
     return send_fragmentized_nal_data(
-        self->transport, ts, max_packet_size, nalu,
-        self->config.is_coded_slice);
+        self->transport, ts, max_packet_size, nalu);
 }
 
 // See <https://tools.ietf.org/html/rfc6184#section-5.8> (H.264),
 // <https://tools.ietf.org/html/rfc7798#section-4.4.3> (H.265).
 static int send_fragmentized_nal_data(
     SmolRTSP_RtpTransport *t, SmolRTSP_RtpTimestamp ts, size_t max_packet_size,
-    SmolRTSP_NalUnit nalu, bool is_coded_slice) {
+    SmolRTSP_NalUnit nalu) {
     const size_t rem = nalu.payload.len % max_packet_size,
                  packets_count = (nalu.payload.len - rem) / max_packet_size;
 
@@ -122,7 +120,7 @@ static int send_fragmentized_nal_data(
             U8Slice99_advance(nalu.payload, packets_count * max_packet_size);
         const SmolRTSP_NalUnit fu = {nalu.header, fu_data};
         const bool is_first_fragment = 0 == packets_count,
-                   is_last_fragment = !is_coded_slice;
+                   is_last_fragment = true;
 
         if (send_fu(t, ts, fu, is_first_fragment, is_last_fragment) == -1) {
             return -1;