diff --git a/Tests/test_file_jpeg2k.py b/Tests/test_file_jpeg2k.py
index 60be50e07..7b512695b 100644
--- a/Tests/test_file_jpeg2k.py
+++ b/Tests/test_file_jpeg2k.py
@@ -409,7 +409,7 @@ def test_crashes(test_file):
 def test_plt_marker():
     # Search the start of the codesteam for the PLT box (id 0xFF58)
     out = BytesIO()
-    test_card.save(out, "JPEG2000", no_jp2=True, add_plt=True)
+    test_card.save(out, "JPEG2000", no_jp2=True, plt=True)
     out.seek(0)
     while True:
         box_bytes = out.read(2)
diff --git a/src/PIL/Jpeg2KImagePlugin.py b/src/PIL/Jpeg2KImagePlugin.py
index 980c299db..e7d91c818 100644
--- a/src/PIL/Jpeg2KImagePlugin.py
+++ b/src/PIL/Jpeg2KImagePlugin.py
@@ -354,7 +354,7 @@ def _save(im, fp, filename):
     comment = info.get("comment")
     if isinstance(comment, str):
         comment = comment.encode()
-    add_plt = info.get("add_plt", False)
+    plt = info.get("plt", False)
 
     fd = -1
     if hasattr(fp, "fileno"):
@@ -379,7 +379,7 @@ def _save(im, fp, filename):
         signed,
         fd,
         comment,
-        add_plt,
+        plt,
     )
 
     ImageFile._save(im, fp, [("jpeg2k", (0, 0) + im.size, 0, kind)])
diff --git a/src/encode.c b/src/encode.c
index 7dcb79766..8aa357b6c 100644
--- a/src/encode.c
+++ b/src/encode.c
@@ -1216,7 +1216,7 @@ PyImaging_Jpeg2KEncoderNew(PyObject *self, PyObject *args) {
     Py_ssize_t fd = -1;
     char *comment = NULL;
     Py_ssize_t comment_size;
-    int add_plt = 0;
+    int plt = 0;
 
     if (!PyArg_ParseTuple(
             args,
@@ -1239,7 +1239,7 @@ PyImaging_Jpeg2KEncoderNew(PyObject *self, PyObject *args) {
             &fd,
             &comment,
             &comment_size,
-            &add_plt)) {
+            &plt)) {
         return NULL;
     }
 
@@ -1358,7 +1358,7 @@ PyImaging_Jpeg2KEncoderNew(PyObject *self, PyObject *args) {
     context->cinema_mode = cine_mode;
     context->mct = mct;
     context->sgnd = sgnd;
-    context->add_plt = add_plt;
+    context->plt = plt;
 
     return (PyObject *)encoder;
 }
diff --git a/src/libImaging/Jpeg2K.h b/src/libImaging/Jpeg2K.h
index 7bf8b4b0a..e8d92f7b6 100644
--- a/src/libImaging/Jpeg2K.h
+++ b/src/libImaging/Jpeg2K.h
@@ -101,7 +101,7 @@ typedef struct {
     char *comment;
 
     /* Include PLT marker segment */
-    int add_plt;
+    int plt;
 
 } JPEG2KENCODESTATE;
 
diff --git a/src/libImaging/Jpeg2KEncode.c b/src/libImaging/Jpeg2KEncode.c
index 6d6add76e..a7c644197 100644
--- a/src/libImaging/Jpeg2KEncode.c
+++ b/src/libImaging/Jpeg2KEncode.c
@@ -502,7 +502,7 @@ j2k_encode_entry(Imaging im, ImagingCodecState state) {
 
     /* Enabling PLT markers only supported in OpenJPEG 2.4.0 and up */
 #if ((OPJ_VERSION_MAJOR == 2 && OPJ_VERSION_MINOR >= 4) || OPJ_VERSION_MAJOR > 2)
-    if (context->add_plt) {
+    if (context->plt) {
         const char * plt_option[2] = {"PLT=YES", NULL};
         opj_encoder_set_extra_options(codec, plt_option);
     }