diff --git a/biosppy/signals/tools.py b/biosppy/signals/tools.py
index 3ed9c725..d132782b 100644
--- a/biosppy/signals/tools.py
+++ b/biosppy/signals/tools.py
@@ -589,7 +589,8 @@ def smoother(signal=None, kernel="boxzen", size=10, mirror=True, **kwargs):
         elif kernel == "median":
             # median filter
             if size % 2 == 0:
-                raise ValueError("When the kernel is 'median', size must be odd.")
+                size -= 1
+                raise Warning("When the kernel is 'median', size must be odd, so the size was decremented by one.")
 
             smoothed = ss.medfilt(signal, kernel_size=size)