diff --git a/src/core/ngx_cycle.c b/src/core/ngx_cycle.c
index bde3171..24e30f7 100644
--- a/src/core/ngx_cycle.c
+++ b/src/core/ngx_cycle.c
@@ -469,7 +469,7 @@
     file.log = cycle->log;
 
     file.fd = ngx_open_file(file.name.data, NGX_FILE_RDWR,
-                            NGX_FILE_CREATE_OR_OPEN);
+                            NGX_FILE_CREATE_OR_OPEN|NGX_FILE_TRUNCATE);
 
     if (file.fd == NGX_INVALID_FILE) {
         ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,