diff --git a/Datum.ProtectedData/public/Unprotect-Datum.ps1 b/Datum.ProtectedData/public/Unprotect-Datum.ps1
index 06f32bb..76a04c8 100644
--- a/Datum.ProtectedData/public/Unprotect-Datum.ps1
+++ b/Datum.ProtectedData/public/Unprotect-Datum.ps1
@@ -107,10 +107,10 @@ function Unprotect-Datum {
         }
         Write-verbose "Calling Unprotect-Data $($PSCmdlet.ParameterSetName)"
         Switch ($PSCmdlet.ParameterSetName) {
-            'ByCertificae' { $UnprotectDataParams.Add('Certificate', $Certificate)}
+            'ByCertificate' { $UnprotectDataParams.Add('Certificate', $Certificate)}
             'ByPassword' { $UnprotectDataParams.Add('Password', $Password)      }
         }
         Unprotect-Data @UnprotectDataParams
     }
 
-}
\ No newline at end of file
+}