diff --git a/src/libs/utils/filepath.cpp b/src/libs/utils/filepath.cpp
index 0197b146c1c..08f26ba7af9 100644
--- a/src/libs/utils/filepath.cpp
+++ b/src/libs/utils/filepath.cpp
@@ -821,8 +821,13 @@ void FilePath::setRootAndPath(QStringView path, OsType osType)
         m_root = "/";
         m_path = path.mid(1).toString();
     } else if (path.startsWith(':')) {
-        m_root = ":/";
-        m_path = path.mid(2).toString();
+        if (path.length() > 1 && path[1] == '/') {
+            m_root = ":/";
+            m_path = path.mid(2).toString();
+        } else {
+            m_root = ":";
+            m_path = path.mid(1).toString();
+        }
     } else {
         m_root.clear();
         m_path = path.toString();
diff --git a/tests/auto/utils/fileutils/tst_fileutils.cpp b/tests/auto/utils/fileutils/tst_fileutils.cpp
index bcf6dc58a8c..b92d9996155 100644
--- a/tests/auto/utils/fileutils/tst_fileutils.cpp
+++ b/tests/auto/utils/fileutils/tst_fileutils.cpp
@@ -350,6 +350,10 @@ void tst_fileutils::fromString_data()
     QTest::addColumn<OsType>("osType");
 
     QTest::newRow("empty") << "" << "" << "" << "" << HostOsInfo::hostOs();
+    QTest::newRow("single-slash") << ":" << "" << "" << ":" << HostOsInfo::hostOs();
+    QTest::newRow("single-colon") << "/" << "" << "" << "/" << HostOsInfo::hostOs();
+    QTest::newRow("single-char") << "a" << "" << "" << "a" << HostOsInfo::hostOs();
+    QTest::newRow("qrc-no-slash") << ":test.txt" << "" << "" << ":test.txt" << HostOsInfo::hostOs();
     QTest::newRow("qrc") << ":/test.txt" << "" << "" << ":/test.txt" << HostOsInfo::hostOs();
     QTest::newRow("unc-incomplete") << "//" << "" << "" << "" << OsType::OsTypeWindows;
     QTest::newRow("unc-incomplete-only-server") << "//server" << "" << "" << "//server/" << OsType::OsTypeWindows;