diff --git a/Duplicati/CommandLine/Help.cs b/Duplicati/CommandLine/Help.cs
index e963538db..575c85626 100644
--- a/Duplicati/CommandLine/Help.cs
+++ b/Duplicati/CommandLine/Help.cs
@@ -84,7 +84,7 @@ namespace Duplicati.CommandLine
                     topic = "exclude";
                 else if (System.Environment.CommandLine.IndexOf("--include", StringComparison.OrdinalIgnoreCase) >= 0)
                     topic = "include";
-                else if (System.Environment.CommandLine.IndexOf("--default-filters", StringComparison.InvariantCultureIgnoreCase) >= 0)
+                else if (System.Environment.CommandLine.IndexOf("--default-filters", StringComparison.OrdinalIgnoreCase) >= 0)
                     topic = "default-filters";
             }
 
diff --git a/Duplicati/Library/Utility/DefaultFilters.cs b/Duplicati/Library/Utility/DefaultFilters.cs
index 1c6ff386e..da52dc719 100644
--- a/Duplicati/Library/Utility/DefaultFilters.cs
+++ b/Duplicati/Library/Utility/DefaultFilters.cs
@@ -41,7 +41,7 @@ namespace Duplicati.Library.Utility
         /// /// </summary>
         private static readonly Dictionary<string, DefaultFilterSet> defaultFilterSetMapping =
             ((DefaultFilterSet[])Enum.GetValues(typeof(DefaultFilterSet)))
-            .ToDictionary(val => val.ToString(), val => val, StringComparer.InvariantCultureIgnoreCase);
+            .ToDictionary(val => val.ToString(), val => val, StringComparer.OrdinalIgnoreCase);
         
         /// <summary>
         /// Filters common for all operating systems
diff --git a/Duplicati/Library/Utility/FilterCollector.cs b/Duplicati/Library/Utility/FilterCollector.cs
index 03fc3ec0a..f22b120ee 100644
--- a/Duplicati/Library/Utility/FilterCollector.cs
+++ b/Duplicati/Library/Utility/FilterCollector.cs
@@ -55,7 +55,7 @@ namespace Duplicati.Library.Utility
                         return false;
                     }
                 }
-                else if (key.Equals("default-filters", StringComparison.InvariantCultureIgnoreCase) || key.Equals("default-filter", StringComparison.InvariantCultureIgnoreCase))
+                else if (key.Equals("default-filters", StringComparison.OrdinalIgnoreCase) || key.Equals("default-filter", StringComparison.OrdinalIgnoreCase))
                 {
                     m_filters.AddRange(DefaultFilters.GetFilters(Library.Utility.Utility.ExpandEnvironmentVariables(value ?? string.Empty)));
                     return false;