diff --git a/src/MagnumPlugins/AnyAudioImporter/AnyImporter.cpp b/src/MagnumPlugins/AnyAudioImporter/AnyImporter.cpp
index aa9b290b1..2e24d4669 100644
--- a/src/MagnumPlugins/AnyAudioImporter/AnyImporter.cpp
+++ b/src/MagnumPlugins/AnyAudioImporter/AnyImporter.cpp
@@ -34,7 +34,7 @@ namespace Magnum { namespace Audio {
 
 AnyImporter::AnyImporter(PluginManager::Manager<AbstractImporter>& manager): AbstractImporter{manager} {}
 
-AnyImporter::AnyImporter(PluginManager::AbstractManager& manager, std::string plugin): AbstractImporter{manager, std::move(plugin)} {}
+AnyImporter::AnyImporter(PluginManager::AbstractManager& manager, const std::string& plugin): AbstractImporter{manager, plugin} {}
 
 AnyImporter::~AnyImporter() = default;
 
diff --git a/src/MagnumPlugins/AnyAudioImporter/AnyImporter.h b/src/MagnumPlugins/AnyAudioImporter/AnyImporter.h
index b15a3809c..7343f355b 100644
--- a/src/MagnumPlugins/AnyAudioImporter/AnyImporter.h
+++ b/src/MagnumPlugins/AnyAudioImporter/AnyImporter.h
@@ -78,7 +78,7 @@ class MAGNUM_ANYAUDIOIMPORTER_EXPORT AnyImporter: public AbstractImporter {
         explicit AnyImporter(PluginManager::Manager<AbstractImporter>& manager);
 
         /** @brief Plugin manager constructor */
-        explicit AnyImporter(PluginManager::AbstractManager& manager, std::string plugin);
+        explicit AnyImporter(PluginManager::AbstractManager& manager, const std::string& plugin);
 
         ~AnyImporter();
 
diff --git a/src/MagnumPlugins/AnyImageConverter/AnyImageConverter.cpp b/src/MagnumPlugins/AnyImageConverter/AnyImageConverter.cpp
index 0b0003a4f..ff7c4c9c3 100644
--- a/src/MagnumPlugins/AnyImageConverter/AnyImageConverter.cpp
+++ b/src/MagnumPlugins/AnyImageConverter/AnyImageConverter.cpp
@@ -35,7 +35,7 @@ namespace Magnum { namespace Trade {
 
 AnyImageConverter::AnyImageConverter(PluginManager::Manager<AbstractImageConverter>& manager): AbstractImageConverter{manager} {}
 
-AnyImageConverter::AnyImageConverter(PluginManager::AbstractManager& manager, std::string plugin): AbstractImageConverter{manager, std::move(plugin)} {}
+AnyImageConverter::AnyImageConverter(PluginManager::AbstractManager& manager, const std::string& plugin): AbstractImageConverter{manager, plugin} {}
 
 AnyImageConverter::~AnyImageConverter() = default;
 
diff --git a/src/MagnumPlugins/AnyImageConverter/AnyImageConverter.h b/src/MagnumPlugins/AnyImageConverter/AnyImageConverter.h
index c20332d4a..488cb328a 100644
--- a/src/MagnumPlugins/AnyImageConverter/AnyImageConverter.h
+++ b/src/MagnumPlugins/AnyImageConverter/AnyImageConverter.h
@@ -80,7 +80,7 @@ class MAGNUM_ANYIMAGECONVERTER_EXPORT AnyImageConverter: public AbstractImageCon
         explicit AnyImageConverter(PluginManager::Manager<AbstractImageConverter>& manager);
 
         /** @brief Plugin manager constructor */
-        explicit AnyImageConverter(PluginManager::AbstractManager& manager, std::string plugin);
+        explicit AnyImageConverter(PluginManager::AbstractManager& manager, const std::string& plugin);
 
         ~AnyImageConverter();
 
diff --git a/src/MagnumPlugins/AnyImageImporter/AnyImageImporter.cpp b/src/MagnumPlugins/AnyImageImporter/AnyImageImporter.cpp
index e9f43014c..ec5c00fa6 100644
--- a/src/MagnumPlugins/AnyImageImporter/AnyImageImporter.cpp
+++ b/src/MagnumPlugins/AnyImageImporter/AnyImageImporter.cpp
@@ -35,7 +35,7 @@ namespace Magnum { namespace Trade {
 
 AnyImageImporter::AnyImageImporter(PluginManager::Manager<AbstractImporter>& manager): AbstractImporter{manager} {}
 
-AnyImageImporter::AnyImageImporter(PluginManager::AbstractManager& manager, std::string plugin): AbstractImporter{manager, std::move(plugin)} {}
+AnyImageImporter::AnyImageImporter(PluginManager::AbstractManager& manager, const std::string& plugin): AbstractImporter{manager, plugin} {}
 
 AnyImageImporter::~AnyImageImporter() = default;
 
diff --git a/src/MagnumPlugins/AnyImageImporter/AnyImageImporter.h b/src/MagnumPlugins/AnyImageImporter/AnyImageImporter.h
index 9c079174b..f0b854234 100644
--- a/src/MagnumPlugins/AnyImageImporter/AnyImageImporter.h
+++ b/src/MagnumPlugins/AnyImageImporter/AnyImageImporter.h
@@ -100,7 +100,7 @@ class MAGNUM_ANYIMAGEIMPORTER_EXPORT AnyImageImporter: public AbstractImporter {
         explicit AnyImageImporter(PluginManager::Manager<AbstractImporter>& manager);
 
         /** @brief Plugin manager constructor */
-        explicit AnyImageImporter(PluginManager::AbstractManager& manager, std::string plugin);
+        explicit AnyImageImporter(PluginManager::AbstractManager& manager, const std::string& plugin);
 
         ~AnyImageImporter();
 
diff --git a/src/MagnumPlugins/AnySceneImporter/AnySceneImporter.cpp b/src/MagnumPlugins/AnySceneImporter/AnySceneImporter.cpp
index 01090f24b..403214a57 100644
--- a/src/MagnumPlugins/AnySceneImporter/AnySceneImporter.cpp
+++ b/src/MagnumPlugins/AnySceneImporter/AnySceneImporter.cpp
@@ -44,7 +44,7 @@ namespace Magnum { namespace Trade {
 
 AnySceneImporter::AnySceneImporter(PluginManager::Manager<AbstractImporter>& manager): AbstractImporter{manager} {}
 
-AnySceneImporter::AnySceneImporter(PluginManager::AbstractManager& manager, std::string plugin): AbstractImporter{manager, std::move(plugin)} {}
+AnySceneImporter::AnySceneImporter(PluginManager::AbstractManager& manager, const std::string& plugin): AbstractImporter{manager, plugin} {}
 
 AnySceneImporter::~AnySceneImporter() = default;
 
diff --git a/src/MagnumPlugins/AnySceneImporter/AnySceneImporter.h b/src/MagnumPlugins/AnySceneImporter/AnySceneImporter.h
index 986dfe83c..094301140 100644
--- a/src/MagnumPlugins/AnySceneImporter/AnySceneImporter.h
+++ b/src/MagnumPlugins/AnySceneImporter/AnySceneImporter.h
@@ -80,7 +80,7 @@ class MAGNUM_ANYSCENEIMPORTER_EXPORT AnySceneImporter: public AbstractImporter {
         explicit AnySceneImporter(PluginManager::Manager<AbstractImporter>& manager);
 
         /** @brief Plugin manager constructor */
-        explicit AnySceneImporter(PluginManager::AbstractManager& manager, std::string plugin);
+        explicit AnySceneImporter(PluginManager::AbstractManager& manager, const std::string& plugin);
 
         ~AnySceneImporter();