diff --git a/renderdocui/Windows/PipelineState/D3D11PipelineStateViewer.cs b/renderdocui/Windows/PipelineState/D3D11PipelineStateViewer.cs
index 6c753320b..b7f55c099 100644
--- a/renderdocui/Windows/PipelineState/D3D11PipelineStateViewer.cs
+++ b/renderdocui/Windows/PipelineState/D3D11PipelineStateViewer.cs
@@ -1843,7 +1843,7 @@ namespace renderdocui.Windows.PipelineState
 
             string mainfile = "";
 
-            var files = new Dictionary<string, string>();
+            var files = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase);
             if (shaderDetails.DebugInfo.entryFunc.Length > 0 && shaderDetails.DebugInfo.files.Length > 0)
             {
                 entryFunc = shaderDetails.DebugInfo.entryFunc;
diff --git a/renderdocui/Windows/ShaderViewer.cs b/renderdocui/Windows/ShaderViewer.cs
index 84d46d153..f8d55c181 100644
--- a/renderdocui/Windows/ShaderViewer.cs
+++ b/renderdocui/Windows/ShaderViewer.cs
@@ -1581,7 +1581,7 @@ namespace renderdocui.Windows
         {
             if (m_SaveCallback != null)
             {
-                var files = new Dictionary<string, string>();
+                var files = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase);
                 foreach (var s in m_Scintillas)
                     files.Add(s.Tag as string, s.Text);
                 m_SaveCallback(this, files);