diff --git a/include/wx/html/htmldefs.h b/include/wx/html/htmldefs.h
index 225625d4dd..38f74088d4 100644
--- a/include/wx/html/htmldefs.h
+++ b/include/wx/html/htmldefs.h
@@ -93,8 +93,6 @@
/* size of one scroll step of wxHtmlWindow in pixels */
#define wxHTML_BUFLEN 1024
/* size of temporary buffer used during parsing */
-#define wxHTML_REALLOC_STEP 32
- /* steps of array reallocation */
#define wxHTML_PRINT_MAX_PAGES 999
/* maximum number of pages printable via html printing */