diff --git a/pandas/_libs/src/ujson/python/objToJSON.c b/pandas/_libs/src/ujson/python/objToJSON.c
index 8cfc20ffd2c1c..1d17cce0bc3a9 100644
--- a/pandas/_libs/src/ujson/python/objToJSON.c
+++ b/pandas/_libs/src/ujson/python/objToJSON.c
@@ -237,9 +237,9 @@ static PyObject *get_values(PyObject *obj) {
         }
     }
 
-    if ((values == NULL) && PyObject_HasAttrString(obj, "get_block_values")) {
+    if ((values == NULL) && PyObject_HasAttrString(obj, "get_block_values_for_json")) {
         PRINTMARK();
-        values = PyObject_CallMethod(obj, "get_block_values", NULL);
+        values = PyObject_CallMethod(obj, "get_block_values_for_json", NULL);
 
         if (values == NULL) {
             // Clear so we can subsequently try another method
diff --git a/pandas/core/internals/blocks.py b/pandas/core/internals/blocks.py
index c088b7020927b..c14225672154b 100644
--- a/pandas/core/internals/blocks.py
+++ b/pandas/core/internals/blocks.py
@@ -231,11 +231,12 @@ def get_values(self, dtype=None):
             return self.values.astype(object)
         return self.values
 
-    def get_block_values(self, dtype=None):
+    def get_block_values_for_json(self) -> np.ndarray:
         """
-        This is used in the JSON C code
+        This is used in the JSON C code.
         """
-        return self.get_values(dtype=dtype)
+        # TODO(2DEA): reshape will be unnecessary with 2D EAs
+        return np.asarray(self.values).reshape(self.shape)
 
     def to_dense(self):
         return self.values.view()