diff --git a/spacy/tokens/doc.pyx b/spacy/tokens/doc.pyx
index 32259b985..f13f6ccd5 100644
--- a/spacy/tokens/doc.pyx
+++ b/spacy/tokens/doc.pyx
@@ -1821,7 +1821,7 @@ cdef class Doc:
          
         # Define working variables
         cdef TokenC tok_c
-        cdef int tok_i, tok_str_l, working_store_i
+        cdef int tok_i, tok_str_l
         cdef attr_t num_tok_attr
         cdef bytes tok_str_bytes
         cdef const unsigned char* tok_str