diff --git a/icepyx/core/APIformatting.py b/icepyx/core/APIformatting.py
index 90b7f3ac6..e3abcfd9d 100644
--- a/icepyx/core/APIformatting.py
+++ b/icepyx/core/APIformatting.py
@@ -209,7 +209,7 @@ def __init__(self, partype, values=None, reqtype=None):
             "CMR",
             "required",
             "subset",
-        ], "You need to submit a valid parametery type."
+        ], "You need to submit a valid parameter type."
         self.partype = partype
 
         if partype == "required":