diff --git a/lib/imap.c b/lib/imap.c
index 21143fb63f..5ef2a2cb21 100644
--- a/lib/imap.c
+++ b/lib/imap.c
@@ -1452,7 +1452,7 @@ static CURLcode imap_state_fetch_resp(struct Curl_easy *data,
       if(result)
         return result;
 
-      infof(data, "Written %zu bytes, %" FMT_OFF_TU
+      infof(data, "Written %zu bytes, %" FMT_OFF_T
             " bytes are left for transfer", chunk, (curl_off_t)(size - chunk));
 
       /* Have we used the entire overflow or part of it?*/