diff --git a/libretroshare/src/file_sharing/hash_cache.cc b/libretroshare/src/file_sharing/hash_cache.cc
index abca37add..538aec5d8 100644
--- a/libretroshare/src/file_sharing/hash_cache.cc
+++ b/libretroshare/src/file_sharing/hash_cache.cc
@@ -76,7 +76,7 @@ void HashStorage::data_tick()
 {
     FileHashJob job;
     RsFileHash hash;
-    uint64_t size ;
+    uint64_t size = 0;
 
     {
         bool empty ;