diff --git a/CHANGES b/CHANGES
index 081033b..62a5a1f 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,8 @@
 v1.0.x - YYYY-MMM-DD (To be released)
 -------------------------------------
 
+ - Exit more gracefully if uri length is zero
+   [@martinhsv]
  - Fixed obtaining of server_addr
    [Issue #167, #168 - @defanator]
  - Avoid processing of subrequests initiated by the error_page 
diff --git a/src/ngx_http_modsecurity_rewrite.c b/src/ngx_http_modsecurity_rewrite.c
index 7ce4355..42bc855 100644
--- a/src/ngx_http_modsecurity_rewrite.c
+++ b/src/ngx_http_modsecurity_rewrite.c
@@ -150,6 +150,10 @@ ngx_http_modsecurity_rewrite_handler(ngx_http_request_t *r)
         if (n_uri == (char*)-1 || n_method == (char*)-1) {
             return NGX_HTTP_INTERNAL_SERVER_ERROR;
         }
+        if (n_uri == NULL) {
+            dd("uri is of length zero");
+            return NGX_HTTP_INTERNAL_SERVER_ERROR;
+        }
         old_pool = ngx_http_modsecurity_pcre_malloc_init(r->pool);
         msc_process_uri(ctx->modsec_transaction, n_uri, n_method, http_version);
         ngx_http_modsecurity_pcre_malloc_done(old_pool);