diff --git a/src/devtools/adb/file_sync_service.c b/src/devtools/adb/file_sync_service.c
index ba87c2c..b2a8bc6 100644
--- a/src/devtools/adb/file_sync_service.c
+++ b/src/devtools/adb/file_sync_service.c
@@ -111,7 +111,7 @@
     struct dirent *de;
     struct stat st;
     syncmsg msg;
-    unsigned int len;
+    int len;
 
     char tmp[1024 + 256 + 1];
     char *fname;