diff --git a/auto/options b/auto/options
index 8ef6ddd..7c729d8 100644
--- a/auto/options
+++ b/auto/options
@@ -29,6 +29,7 @@
 
 USE_THREADS=NO
 
+HTTP_CHARSET=YES
 HTTP_REWRITE=YES
 HTTP_GZIP=YES
 HTTP_SSI=YES
@@ -80,6 +81,7 @@
         --with-threads=*)                USE_THREADS="$value"       ;;
         --with-threads)                  USE_THREADS="pthreads"     ;;
 
+        --without-http_charset_module)   HTTP_CHARSET=NO            ;;
         --without-http_rewrite_module)   HTTP_REWRITE=NO            ;;
         --without-http_ssi_module)       HTTP_SSI=NO                ;;
         --without-http_gzip_module)      HTTP_GZIP=NO               ;;