1 files changed, 3 insertions, 2 deletions

diff --git a/libbb/progress.c b/libbb/progress.c
index 23e974ce7..d071ce705 100644
--- a/libbb/progress.c
+++ b/libbb/progress.c
@@ -69,7 +69,7 @@ void FAST_FUNC bb_progress_init(bb_progress_t *p, const char *curfile)
  * will be "totalsize" bytes.
  * If totalsize == 0, then it is unknown.
  */
-void FAST_FUNC bb_progress_update(bb_progress_t *p,
+int FAST_FUNC bb_progress_update(bb_progress_t *p,
                 uoff_t beg_size,
                 uoff_t transferred,
                 uoff_t totalsize)
@@ -94,7 +94,7 @@ void FAST_FUNC bb_progress_update(bb_progress_t *p,
                  * Do not update on every call
                  * (we can be called on every network read!)
                  */
-                return;
+                return -1;
         }
 
         /* Before we lose real, unscaled sizes, produce human-readable size string */
@@ -211,4 +211,5 @@ void FAST_FUNC bb_progress_update(bb_progress_t *p,
         }
         if (notty)
                 fputc('\n', stderr);
+        return notty;
 }