diff --git a/parser/codecs.py b/parser/codecs.py
index ef9cc4d..b25a15a 100644
--- a/parser/codecs.py
+++ b/parser/codecs.py
@@ -128,7 +128,8 @@ def keyed(cls, cands, sql_type, side, table):
         for the class only when it is the encoding's one candidate (``interval_in``). Two
         functions of one encoding for one SQL type rank by ``table``, whose first match
         names the encoding (``cbuffer_out`` before ``cbuffer_as_text`` and
-        ``cbuffer_as_ewkt``), then by how many SQL types each serves, the narrower first,
+        ``cbuffer_as_ewkt``, ``cbuffer_as_hexwkb`` before ``cbuffer_as_hexewkb``), then by
+        how many SQL types each serves, the narrower first,
         as PostgreSQL resolves an overload to its most specific candidate
         (``cbufferset_out`` before ``spatialset_out`` for a ``cbufferset``). Two that tie
         on both contradict each other."""
diff --git a/parser/enrich.py b/parser/enrich.py
index a518e1c..ff031c7 100644
--- a/parser/enrich.py
+++ b/parser/enrich.py
@@ -65,7 +65,10 @@
     (re.compile(r"_as_e?wkt$"), "text"),
     (re.compile(r"_as_mfjson$"), "mfjson"),
     (re.compile(r"_as_geojson$"), "mfjson"),
-    (re.compile(r"_as_hex_?e?wkb$"), "wkb"),
+    # The plain hex-WKB writer ranks before the E one, so a class having both keeps the
+    # plain one as its codec (#keyed of parser/codecs.py ranks by this order).
+    (re.compile(r"_as_hex_?wkb$"), "wkb"),
+    (re.compile(r"_as_hex_?ewkb$"), "wkb"),
     (re.compile(r"_as_e?wkb$"), "wkb"),
 ]
 _DECODERS = [
@@ -74,7 +77,8 @@
     (re.compile(r"_from_text$"), "text"),
     (re.compile(r"_from_mfjson$"), "mfjson"),
     (re.compile(r"_from_geojson$"), "mfjson"),
-    (re.compile(r"_from_hex_?e?wkb$"), "wkb"),
+    (re.compile(r"_from_hex_?wkb$"), "wkb"),
+    (re.compile(r"_from_hex_?ewkb$"), "wkb"),
     (re.compile(r"_from_e?wkb$"), "wkb"),
 ]
 _IO_RE = [rx for rx, _ in _DECODERS + _ENCODERS]
diff --git a/tests/test_codecs.py b/tests/test_codecs.py
index 6344877..5b8774b 100644
--- a/tests/test_codecs.py
+++ b/tests/test_codecs.py
@@ -139,6 +139,32 @@ def test_a_hexewkb_reader_per_type_and_one_writer_for_both(self):
         self.assertEqual(g["encoderAux"]["wkb"],
                          [{"name": "endian", "kind": "string", "default": None}])
 
+    def test_the_plain_hex_writer_and_reader_rank_before_the_e_ones(self):
+        """A class having both the plain and the E hex-WKB functions keeps the plain ones,
+        as #test_a_hexewkb_reader_per_type_and_one_writer_for_both keeps the E ones of a
+        class having no other."""
+        cb = "const Cbuffer *"
+        both = FUNCTIONS + [
+            fn("cbuffer_from_hexwkb", "Cbuffer *", [("const char *", "hexwkb")],
+               [sig("cbufferFromHexWKB", ["text"], "cbuffer")]),
+            fn("cbuffer_from_hexewkb", "Cbuffer *", [("const char *", "hexwkb")],
+               [sig("cbufferFromHexEWKB", ["text"], "cbuffer")]),
+            fn("cbuffer_as_hexwkb", "char *",
+               [(cb, "cb"), ("uint8_t", "variant"), ("size_t *", "size_out")],
+               [sig("asHexWKB", ["cbuffer", "text"], "text")],
+               shape={"outParams": ["size_out"]}),
+            fn("cbuffer_as_hexewkb", "char *",
+               [(cb, "cb"), ("uint8_t", "variant"), ("size_t *", "size_out")],
+               [sig("asHexEWKB", ["cbuffer", "text"], "text")],
+               shape={"outParams": ["size_out"]})]
+        idl = _idl(both)
+        idl["typeEncodings"]["Cbuffer"] = {}
+        idl, errors = state_type_encodings(idl)
+        c = idl["typeEncodings"]["Cbuffer"]
+        self.assertEqual((c["decoders"]["wkb"], c["encoders"]["wkb"]),
+                         ("cbuffer_from_hexwkb", "cbuffer_as_hexwkb"))
+        self.assertEqual(errors, [])
+
     def test_a_cell_is_a_class_of_its_own(self):
         h = self.te["H3Index"]
         self.assertEqual((h["in"], h["out"]), ("h3index_in", "h3index_out"))
diff --git a/tests/test_sqlfn_deployed.py b/tests/test_sqlfn_deployed.py
index 160fcb8..1f3bc9b 100644
--- a/tests/test_sqlfn_deployed.py
+++ b/tests/test_sqlfn_deployed.py
@@ -87,7 +87,7 @@ def setUp(self):
     def test_per_type_functions_carry_their_own_name(self):
         for name, sqlfn in (("floatset_in", "floatset_in"), ("tfloat_in", "tfloat_in"),
                             ("tfloatinst_make", "tfloat"), ("tfloat_values", "valueSet"),
-                            ("contains_cbuffer_cbuffer", "cbuffer_contains")):
+                            ("contains_cbuffer_cbuffer", "cbufferContains")):
             self.assertEqual(self.fns[name]["sqlfn"], sqlfn, name)
 
     def test_an_operator_function_carries_its_class_prefixed_name(self):