diff --git a/doc/python_api/rst_from_bmesh_opdefines.py b/doc/python_api/rst_from_bmesh_opdefines.py
index 98212238b2d..3b10d5da46d 100644
--- a/doc/python_api/rst_from_bmesh_opdefines.py
+++ b/doc/python_api/rst_from_bmesh_opdefines.py
@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 # This is a quite stupid script which extracts bmesh api docs from
-# 'bmesh_opdefines.c' in order to avoid having to add a lot of introspection
+# 'bmesh_opdefines.cc' in order to avoid having to add a lot of introspection
 # data access into the api.
 #
 # The script is stupid because it makes assumptions about formatting...
@@ -19,7 +19,7 @@ import re
 
 CURRENT_DIR = os.path.abspath(os.path.dirname(__file__))
 SOURCE_DIR = os.path.normpath(os.path.abspath(os.path.normpath(os.path.join(CURRENT_DIR, "..", ".."))))
-FILE_OP_DEFINES_C = os.path.join(SOURCE_DIR, "source", "blender", "bmesh", "intern", "bmesh_opdefines.c")
+FILE_OP_DEFINES_CC = os.path.join(SOURCE_DIR, "source", "blender", "bmesh", "intern", "bmesh_opdefines.cc")
 OUT_RST = os.path.join(CURRENT_DIR, "rst", "bmesh.ops.rst")
 
 HEADER = r"""
@@ -43,7 +43,7 @@ This script shows how operators can be used to model a link of a chain.
 
 
 def main():
-    fsrc = open(FILE_OP_DEFINES_C, 'r', encoding="utf-8")
+    fsrc = open(FILE_OP_DEFINES_CC, 'r', encoding="utf-8")
 
     blocks = []
 
diff --git a/source/blender/bmesh/intern/bmesh_operator_api.h b/source/blender/bmesh/intern/bmesh_operator_api.h
index e032c521fc7..29e8b57673d 100644
--- a/source/blender/bmesh/intern/bmesh_operator_api.h
+++ b/source/blender/bmesh/intern/bmesh_operator_api.h
@@ -30,10 +30,10 @@ extern "C" {
  * - hash mappings.
  *
  * each slot is identified by a slot code, as are each operator.
- * operators, and their slots, are defined in bmesh_opdefines.c (with their
+ * operators, and their slots, are defined in bmesh_opdefines.cc (with their
  * execution functions prototyped in bmesh_operators_private.h), with all their
  * operator code and slot codes defined in bmesh_operators.h.  see
- * bmesh_opdefines.c and the BMOpDefine struct for how to define new operators.
+ * bmesh_opdefines.cc and the BMOpDefine struct for how to define new operators.
  *
  * in general, operators are fed arrays of elements, created using either
  * #BMO_slot_buffer_from_hflag or #BMO_slot_buffer_from_flag
diff --git a/source/blender/bmesh/intern/bmesh_operators.h b/source/blender/bmesh/intern/bmesh_operators.h
index 6e1c24a5f26..7a3b2ffa7d8 100644
--- a/source/blender/bmesh/intern/bmesh_operators.h
+++ b/source/blender/bmesh/intern/bmesh_operators.h
@@ -8,7 +8,7 @@
  * \ingroup bmesh
  */
 
-/* See comments in `intern/bmesh_opdefines.c` for documentation of specific operators. */
+/* See comments in `intern/bmesh_opdefines.cc` for documentation of specific operators. */
 
 #ifdef __cplusplus
 extern "C" {