diff --git a/src/base/search/searchpluginmanager.cpp b/src/base/search/searchpluginmanager.cpp
index b697ef05b..0624256cd 100644
--- a/src/base/search/searchpluginmanager.cpp
+++ b/src/base/search/searchpluginmanager.cpp
@@ -366,7 +366,7 @@ QString SearchPluginManager::categoryFullName(const QString &categoryName)
     return categoryTable.value(categoryName);
 }
 
-QString SearchPluginManager::pluginFullName(const QString &pluginName)
+QString SearchPluginManager::pluginFullName(const QString &pluginName) const
 {
     return pluginInfo(pluginName) ? pluginInfo(pluginName)->fullName : QString();
 }
diff --git a/src/base/search/searchpluginmanager.h b/src/base/search/searchpluginmanager.h
index fcba073f0..35ec0cf18 100644
--- a/src/base/search/searchpluginmanager.h
+++ b/src/base/search/searchpluginmanager.h
@@ -88,7 +88,7 @@ public:
 
     static PluginVersion getPluginVersion(const Path &filePath);
     static QString categoryFullName(const QString &categoryName);
-    QString pluginFullName(const QString &pluginName);
+    QString pluginFullName(const QString &pluginName) const;
     static Path pluginsLocation();
     static Path engineLocation();