diff --git a/src/Caliburn.Micro/Conductor.cs b/src/Caliburn.Micro/Conductor.cs
index 157d1068..dcc11149 100644
--- a/src/Caliburn.Micro/Conductor.cs
+++ b/src/Caliburn.Micro/Conductor.cs
@@ -60,7 +60,7 @@ protected override void OnActivate() {
         /// <summary>
         /// Called when deactivating.
         /// </summary>
-        /// <param name="close">Inidicates whether this instance will be closed.</param>
+        /// <param name="close">Indicates whether this instance will be closed.</param>
         protected override void OnDeactivate(bool close) {
             ScreenExtensions.TryDeactivate(ActiveItem, close);
         }
diff --git a/src/Caliburn.Micro/ConductorWithCollectionAllActive.cs b/src/Caliburn.Micro/ConductorWithCollectionAllActive.cs
index 851ce4a3..5be5085a 100644
--- a/src/Caliburn.Micro/ConductorWithCollectionAllActive.cs
+++ b/src/Caliburn.Micro/ConductorWithCollectionAllActive.cs
@@ -65,7 +65,7 @@ protected override void OnActivate() {
                 /// <summary>
                 /// Called when deactivating.
                 /// </summary>
-                /// <param name="close">Inidicates whether this instance will be closed.</param>
+                /// <param name="close">Indicates whether this instance will be closed.</param>
                 protected override void OnDeactivate(bool close) {
                     items.OfType<IDeactivate>().Apply(x => x.Deactivate(close));
                     if (close) {
diff --git a/src/Caliburn.Micro/ConductorWithCollectionOneActive.cs b/src/Caliburn.Micro/ConductorWithCollectionOneActive.cs
index cde076ee..059e540f 100644
--- a/src/Caliburn.Micro/ConductorWithCollectionOneActive.cs
+++ b/src/Caliburn.Micro/ConductorWithCollectionOneActive.cs
@@ -170,7 +170,7 @@ protected override void OnActivate() {
                 /// <summary>
                 /// Called when deactivating.
                 /// </summary>
-                /// <param name="close">Inidicates whether this instance will be closed.</param>
+                /// <param name="close">Indicates whether this instance will be closed.</param>
                 protected override void OnDeactivate(bool close) {
                     if (close) {
                         items.OfType<IDeactivate>().Apply(x => x.Deactivate(true));
diff --git a/src/Caliburn.Micro/Screen.cs b/src/Caliburn.Micro/Screen.cs
index 94822830..309c5d21 100644
--- a/src/Caliburn.Micro/Screen.cs
+++ b/src/Caliburn.Micro/Screen.cs
@@ -147,7 +147,7 @@ void IDeactivate.Deactivate(bool close) {
         /// <summary>
         /// Called when deactivating.
         /// </summary>
-        /// <param name = "close">Inidicates whether this instance will be closed.</param>
+        /// <param name = "close">Indicates whether this instance will be closed.</param>
         protected virtual void OnDeactivate(bool close) {}
 
         /// <summary>