diff --git a/lasio/las.py b/lasio/las.py
index 47b3cb2..724a03f 100644
--- a/lasio/las.py
+++ b/lasio/las.py
@@ -1055,7 +1055,6 @@ def stack_curves(self, mnemonic, sort_curves=True):
             channels = list(mnemonic)
         else:
             raise TypeError("`mnemonic` argument must be string or sequence")
-        print(channels)
 
         if not set(keys).issuperset(set(channels)):
             missing = ", ".join(set(channels).difference(set(keys)))