diff --git a/src/plugins/debugger/debuggerengine.cpp b/src/plugins/debugger/debuggerengine.cpp
index 72de7617234..8dd7668ce34 100644
--- a/src/plugins/debugger/debuggerengine.cpp
+++ b/src/plugins/debugger/debuggerengine.cpp
@@ -330,7 +330,7 @@ void DebuggerRunParameters::setStartMode(DebuggerStartMode startMode)
 void DebuggerRunParameters::addSolibSearchDir(const QString &str)
 {
     QString path = str;
-    path.replace("%{sysroot}", sysRoot.toString());
+    path.replace("%{sysroot}", sysRoot.toUrlishString());
     m_solibSearchPath.append(FilePath::fromString(path));
 }