diff --git a/src/plugins/ios/iosrunfactories.cpp b/src/plugins/ios/iosrunfactories.cpp
index aca51c9fcc5..259ebbe1b91 100644
--- a/src/plugins/ios/iosrunfactories.cpp
+++ b/src/plugins/ios/iosrunfactories.cpp
@@ -59,11 +59,7 @@ namespace Internal {
 
 static QString pathFromId(const Core::Id id)
 {
-    QString pathStr = id.toString();
-    const QString prefix = QLatin1String(IOS_RC_ID_PREFIX);
-    if (!pathStr.startsWith(prefix))
-        return QString();
-    return pathStr.mid(prefix.size());
+    return id.suffixAfter(IOS_RC_ID_PREFIX);
 }
 
 IosRunConfigurationFactory::IosRunConfigurationFactory(QObject *parent)
diff --git a/src/plugins/remotelinux/remotelinuxrunconfigurationfactory.cpp b/src/plugins/remotelinux/remotelinuxrunconfigurationfactory.cpp
index 37438dcc2ba..93bda58d2f5 100644
--- a/src/plugins/remotelinux/remotelinuxrunconfigurationfactory.cpp
+++ b/src/plugins/remotelinux/remotelinuxrunconfigurationfactory.cpp
@@ -49,10 +49,7 @@ namespace Internal {
 namespace {
 QString pathFromId(Core::Id id)
 {
-    QByteArray idStr = id.name();
-    if (!idStr.startsWith(RemoteLinuxRunConfiguration::IdPrefix))
-        return QString();
-    return QString::fromUtf8(idStr.mid(strlen(RemoteLinuxRunConfiguration::IdPrefix)));
+    return id.suffixAfter(RemoteLinuxRunConfiguration::IdPrefix);
 }
 
 } // namespace