diff --git a/Doc/data/stable_abi.dat b/Doc/data/stable_abi.dat
index b41027dee87..46ee321b660 100644
--- a/Doc/data/stable_abi.dat
+++ b/Doc/data/stable_abi.dat
@@ -569,6 +569,7 @@ function,PyStructSequence_GetItem,3.2,
 function,PyStructSequence_New,3.2,
 function,PyStructSequence_NewType,3.2,
 function,PyStructSequence_SetItem,3.2,
+var,PyStructSequence_UnnamedField,3.11,
 var,PySuper_Type,3.2,
 function,PySys_AddWarnOption,3.2,
 function,PySys_AddWarnOptionUnicode,3.2,
diff --git a/Include/structseq.h b/Include/structseq.h
index 8f51c89163a..e89265a67c3 100644
--- a/Include/structseq.h
+++ b/Include/structseq.h
@@ -19,7 +19,7 @@ typedef struct PyStructSequence_Desc {
     int n_in_sequence;
 } PyStructSequence_Desc;
 
-extern const char * const PyStructSequence_UnnamedField;
+PyAPI_DATA(const char * const) PyStructSequence_UnnamedField;
 
 #ifndef Py_LIMITED_API
 PyAPI_FUNC(void) PyStructSequence_InitType(PyTypeObject *type,
diff --git a/Misc/NEWS.d/next/C API/2021-05-24-22-12-40.bpo-44220.H9CUGl.rst b/Misc/NEWS.d/next/C API/2021-05-24-22-12-40.bpo-44220.H9CUGl.rst
new file mode 100644
index 00000000000..79ba8aa07cd
--- /dev/null
+++ b/Misc/NEWS.d/next/C API/2021-05-24-22-12-40.bpo-44220.H9CUGl.rst	
@@ -0,0 +1 @@
+:c:var:`PyStructSequence_UnnamedField` is added to the Stable ABI.
diff --git a/Misc/stable_abi.txt b/Misc/stable_abi.txt
index 8e79f521306..23e5b96a0e8 100644
--- a/Misc/stable_abi.txt
+++ b/Misc/stable_abi.txt
@@ -2149,6 +2149,8 @@ function PyType_GetName
     added 3.11
 function PyType_GetQualName
     added 3.11
+data PyStructSequence_UnnamedField
+    added 3.11
 
 # (Detailed comments aren't really needed for further entries: from here on
 #  we can use version control logs.)
diff --git a/PC/python3dll.c b/PC/python3dll.c
index 49b51e69d62..d9e6fd3e7ca 100755
--- a/PC/python3dll.c
+++ b/PC/python3dll.c
@@ -842,6 +842,7 @@ EXPORT_DATA(PySeqIter_Type)
 EXPORT_DATA(PySet_Type)
 EXPORT_DATA(PySetIter_Type)
 EXPORT_DATA(PySlice_Type)
+EXPORT_DATA(PyStructSequence_UnnamedField)
 EXPORT_DATA(PySuper_Type)
 EXPORT_DATA(PyTraceBack_Type)
 EXPORT_DATA(PyTuple_Type)