diff --git a/plugin/business/pangu-http/src/pangu_web_cache.cpp b/plugin/business/pangu-http/src/pangu_web_cache.cpp
index 48b73cb..a86096f 100644
--- a/plugin/business/pangu-http/src/pangu_web_cache.cpp
+++ b/plugin/business/pangu-http/src/pangu_web_cache.cpp
@@ -618,7 +618,7 @@ struct cache_handle* create_web_cache_handle(const char* profile_path, const cha
 			p_bloom->thread_id=i;
 			p_bloom->size=cache->cache_key_bloom_size;
 			p_bloom->error_rate=0.01;
-			snprintf(p_bloom->filename, sizeof(p_bloom->filename), "/tmp/pangu_cache_blooms.%d", i);
+			snprintf(p_bloom->filename, sizeof(p_bloom->filename), "/tmp/pangu_cache_blooms.%02d", i);
 			p_bloom->bloom=new_counting_bloom(p_bloom->size, p_bloom->error_rate, p_bloom->filename);
 			if(p_bloom->bloom==NULL)
 			{