diff --git a/src/file/regexpcache.cpp b/src/file/regexpcache.cpp
--- a/src/file/regexpcache.cpp
+++ b/src/file/regexpcache.cpp
@@ -78,7 +78,7 @@
     }
 
     // Combine all suffixes into one large RE: "^.*(foo|bar|baz)$"
-    auto suffixMatch = QLatin1String("^.*\\.(");
+    QString suffixMatch = QLatin1String("^.*\\.(");
     suffixMatch += suffixes.join(QChar('|'));
     suffixMatch += QLatin1String(")$");
     qCDebug(BALOO) << suffixMatch;