diff --git a/NEWS b/NEWS
index 05f56ef39..f6172c454 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,6 @@
 ver 0.22.4 (not yet released)
+* protocol
+  - fix "readpicture" on 32 bit machines
 * storage
   - curl: fix several WebDAV protocol bugs
 * decoder
diff --git a/src/command/FileCommands.cxx b/src/command/FileCommands.cxx
index e50e3324d..dc68463aa 100644
--- a/src/command/FileCommands.cxx
+++ b/src/command/FileCommands.cxx
@@ -296,7 +296,7 @@ public:
 			return;
 		}
 
-		response.Format("size: %" PRIoffset "\n", buffer.size);
+		response.Format("size: %zu\n", buffer.size);
 
 		if (mime_type != nullptr)
 			response.Format("type: %s\n", mime_type);