diff --git a/soitool/coder.py b/soitool/coder.py
index e900cc3e8042f41c0a168c49d41fdd28b4e1fcf9..369942ca17cb95898227960d7cdfbc85f5a4d048 100644
--- a/soitool/coder.py
+++ b/soitool/coder.py
@@ -18,7 +18,8 @@ def get_code(code_length, mode="ascii", space_interval=0):
         'ascii' for letters, 'digits' for digits and 'combo' for
         combination of letters and digits, by default 'ascii'.
     space_interval : int
-        Spaces will be inserted to code each interval if not 0, by default 0.
+        Spaces will be inserted into code each interval for readability if not
+        0, by default 0.
 
     Return
     ------