diff --git a/retopoflow/cy/bmesh_enums.pxd b/retopoflow/cy/bmesh_enums.pxd
new file mode 100644
index 00000000..a2e54d60
--- /dev/null
+++ b/retopoflow/cy/bmesh_enums.pxd
@@ -0,0 +1,34 @@
+# cython: language_level=3
+
+import cython
+from libc.stdint cimport uint8_t
+
+from .bmesh_fast import BMHeader
+
+
+cdef enum BMElemHFlag:
+    BM_ELEM_SELECT       = (1 << 0)  # 1
+    BM_ELEM_HIDDEN       = (1 << 1)  # 2
+    BM_ELEM_SEAM         = (1 << 2)  # 4
+    BM_ELEM_SMOOTH       = (1 << 3)  # 8
+    BM_ELEM_TAG          = (1 << 4)  # 16
+    BM_ELEM_DRAW         = (1 << 5)  # 32
+    BM_ELEM_TAG_ALT      = (1 << 6)  # 64
+    BM_ELEM_INTERNAL_TAG = (1 << 7)  # 128
+
+# Helper functions to check flags
+@cython.inline
+cdef bint BM_elem_flag_test(BMHeader head, uint8_t hflag) nogil:
+    return head.hflag & hflag
+
+@cython.inline
+cdef void BM_elem_flag_set(BMHeader head, uint8_t hflag) nogil:
+    head.hflag |= hflag
+
+@cython.inline
+cdef void BM_elem_flag_clear(BMHeader head, uint8_t hflag) nogil:
+    head.hflag &= ~hflag
+
+@cython.inline
+cdef void BM_elem_flag_toggle(BMHeader head, uint8_t hflag) nogil:
+    head.hflag ^= hflag