diff --git a/src/plasma/svg.cpp b/src/plasma/svg.cpp
--- a/src/plasma/svg.cpp
+++ b/src/plasma/svg.cpp
@@ -310,7 +310,7 @@
     if (elementsWithSizeHints.isEmpty()) {
         // Fetch all size hinted element ids from the theme's rect cache
         // and store them locally.
-        const QRegularExpression sizeHintedKeyExpr(CACHE_ID_NATURAL_SIZE(QStringLiteral("$(\\d+)-(\\d+)-(.+)^"), status, ratio));
+        const QRegularExpression sizeHintedKeyExpr(QLatin1String("^") + CACHE_ID_NATURAL_SIZE(QStringLiteral("(\\d+)-(\\d+)-(.+)"), status, ratio) + QLatin1String("$"));
 
         foreach (const QString &key, cacheAndColorsTheme()->listCachedRectKeys(path)) {
             const auto match = sizeHintedKeyExpr.match(key);