diff --git a/renderdocui/Code/Core.cs b/renderdocui/Code/Core.cs
index 2056f557e..1eaa4a83f 100644
--- a/renderdocui/Code/Core.cs
+++ b/renderdocui/Code/Core.cs
@@ -59,6 +59,7 @@ namespace renderdocui.Code
 
         private bool m_LogLocal = false;
         private bool m_LogLoaded = false;
+        private bool m_GlobalHookEnabled = false;
 
         private FileSystemWatcher m_LogWatcher = null;
 
@@ -119,6 +120,8 @@ namespace renderdocui.Code
         public string LogFileName { get { return m_LogFile; } set { if (LogLoaded) m_LogFile = value; } }
         public bool IsLogLocal { get { return m_LogLocal; } set { m_LogLocal = value; } }
 
+        public bool GlobalHookEnabled { get { return m_GlobalHookEnabled; } set { m_GlobalHookEnabled = value; } }
+
         public FetchFrameInfo FrameInfo { get { return m_FrameInfo; } }
 
         public APIProperties APIProps { get { return m_APIProperties; } }
diff --git a/renderdocui/Windows/Dialogs/CaptureDialog.cs b/renderdocui/Windows/Dialogs/CaptureDialog.cs
index 16992f32f..619226358 100644
--- a/renderdocui/Windows/Dialogs/CaptureDialog.cs
+++ b/renderdocui/Windows/Dialogs/CaptureDialog.cs
@@ -928,6 +928,8 @@ namespace renderdocui.Windows.Dialogs
 
             toggleGlobalHook.Enabled = false;
 
+            m_Core.GlobalHookEnabled = false;
+
             if (toggleGlobalHook.Checked)
             {
                 if(!Helpers.IsElevated)
@@ -1124,6 +1126,8 @@ namespace renderdocui.Windows.Dialogs
                 logfile = m_Core.TempLogFilename(logfile);
 
                 StaticExports.StartGlobalHook(exe, logfile, GetSettings().Options);
+
+                m_Core.GlobalHookEnabled = true;
             }
             else
             {
diff --git a/renderdocui/Windows/MainWindow.cs b/renderdocui/Windows/MainWindow.cs
index 74ca789ea..8245a8d26 100644
--- a/renderdocui/Windows/MainWindow.cs
+++ b/renderdocui/Windows/MainWindow.cs
@@ -1709,6 +1709,14 @@ namespace renderdocui.Windows
                 }
             }
 
+            if (m_Core.GlobalHookEnabled)
+            {
+                MessageBox.Show("Cannot close RenderDoc while global hook is active.", "Global hook active",
+                                MessageBoxButtons.OK, MessageBoxIcon.Error);
+                e.Cancel = true;
+                return;
+            }
+
             if (!PromptCloseLog())
             {
                 e.Cancel = true;