diff --git a/src/plugins/coreplugin/editormanager/documentmodel.cpp b/src/plugins/coreplugin/editormanager/documentmodel.cpp
index 64c20e370d05b378e1e189e5f3e159111d972bc6..4fb99ae9a5b3873a56c66cccd9630ce1f3de56f0 100644
--- a/src/plugins/coreplugin/editormanager/documentmodel.cpp
+++ b/src/plugins/coreplugin/editormanager/documentmodel.cpp
@@ -31,6 +31,7 @@
 
 #include <utils/algorithm.h>
 #include <utils/dropsupport.h>
+#include <utils/hostosinfo.h>
 #include <utils/qtcassert.h>
 
 #include <QAbstractItemModel>
@@ -323,7 +324,7 @@ bool DocumentModelPrivate::disambiguateDisplayNames(DocumentModel::Entry *entry)
                 }
                 for (int j = i + 1; j < dupsCount; ++j) {
                     DynamicEntry &e2 = dups[j];
-                    if (e->displayName() == e2->displayName()) {
+                    if (e->displayName().compare(e2->displayName(), Utils::HostOsInfo::fileNameCaseSensitivity()) == 0) {
                         const Utils::FileName otherFileName = e2->document->filePath();
                         if (otherFileName.isEmpty())
                             continue;