diff --git a/devine/core/manifests/dash.py b/devine/core/manifests/dash.py
index 6bb534d..84f063e 100644
--- a/devine/core/manifests/dash.py
+++ b/devine/core/manifests/dash.py
@@ -568,7 +568,7 @@ class DASH:
 
                         if download_sizes and (time_since > 5 or finished_threads == len(segments)):
                             data_size = sum(download_sizes)
-                            download_speed = data_size / time_since
+                            download_speed = data_size / (time_since or 1)
                             progress(downloaded=f"DASH {filesize.decimal(download_speed)}/s")
                             last_speed_refresh = now
                             download_sizes.clear()
diff --git a/devine/core/manifests/hls.py b/devine/core/manifests/hls.py
index bb34c8a..cb53175 100644
--- a/devine/core/manifests/hls.py
+++ b/devine/core/manifests/hls.py
@@ -413,7 +413,7 @@ class HLS:
 
                     if download_sizes and (time_since > 5 or finished_threads == len(master.segments)):
                         data_size = sum(download_sizes)
-                        download_speed = data_size / time_since
+                        download_speed = data_size / (time_since or 1)
                         progress(downloaded=f"HLS {filesize.decimal(download_speed)}/s")
                         last_speed_refresh = now
                         download_sizes.clear()