diff --git a/aac2eac.py b/aac2eac.py
index 939989b..0bdc2a4 100644
--- a/aac2eac.py
+++ b/aac2eac.py
@@ -36,7 +36,8 @@ log = logging.getLogger("aac2eac3")
 # ----------------------------
 
 def ffprobe_path():
-    return args.ffmpeg.replace("ffmpeg", "ffprobe")
+    ffmpeg = Path(args.ffmpeg)
+    return str(ffmpeg.parent / ffmpeg.name.replace("ffmpeg", "ffprobe"))
 
 
 def probe_streams(file: Path):