diff --git a/src/ai/ai_info.cpp b/src/ai/ai_info.cpp
--- a/src/ai/ai_info.cpp
+++ b/src/ai/ai_info.cpp
@@ -46,52 +46,12 @@ AILibrary::~AILibrary()
 	free((void *)this->category);
 }
 
-const char *AIFileInfo::GetAuthor()
-{
-	return this->author;
-}
-
-const char *AIFileInfo::GetName()
-{
-	return this->name;
-}
-
-const char *AIFileInfo::GetShortName()
-{
-	return this->short_name;
-}
-
-const char *AIFileInfo::GetDescription()
-{
-	return this->description;
-}
-
-int AIFileInfo::GetVersion()
-{
-	return this->version;
-}
-
-void AIFileInfo::GetSettings()
+void AIFileInfo::GetSettings() const
 {
 	this->engine->CallMethod(*this->SQ_instance, "GetSettings", NULL, -1);
 }
 
-const char *AIFileInfo::GetDate()
-{
-	return this->date;
-}
-
-const char *AIFileInfo::GetInstanceName()
-{
-	return this->instance_name;
-}
-
-const char *AIFileInfo::GetMainScript()
-{
-	return this->main_script;
-}
-
-bool AIFileInfo::CheckMethod(const char *name)
+bool AIFileInfo::CheckMethod(const char *name) const
 {
 	if (!this->engine->MethodExists(*this->SQ_instance, name)) {
 		char error[1024];
@@ -207,7 +167,7 @@ AIInfo::~AIInfo()
 	this->config_list.clear();
 }
 
-bool AIInfo::CanLoadFromVersion(int version)
+bool AIInfo::CanLoadFromVersion(int version) const
 {
 	if (version == -1) return true;
 	return version >= this->min_loadable_version && version <= this->GetVersion();
@@ -365,22 +325,22 @@ SQInteger AIInfo::AddLabels(HSQUIRRELVM 
 	return 0;
 }
 
-const AIConfigItemList *AIInfo::GetConfigList()
+const AIConfigItemList *AIInfo::GetConfigList() const
 {
 	return &this->config_list;
 }
 
-const AIConfigItem *AIInfo::GetConfigItem(const char *name)
+const AIConfigItem *AIInfo::GetConfigItem(const char *name) const
 {
-	for (AIConfigItemList::iterator it = this->config_list.begin(); it != this->config_list.end(); it++) {
+	for (AIConfigItemList::const_iterator it = this->config_list.begin(); it != this->config_list.end(); it++) {
 		if (strcmp((*it).name, name) == 0) return &(*it);
 	}
 	return NULL;
 }
 
-int AIInfo::GetSettingDefaultValue(const char *name)
+int AIInfo::GetSettingDefaultValue(const char *name) const
 {
-	for (AIConfigItemList::iterator it = this->config_list.begin(); it != this->config_list.end(); it++) {
+	for (AIConfigItemList::const_iterator it = this->config_list.begin(); it != this->config_list.end(); it++) {
 		if (strcmp((*it).name, name) != 0) continue;
 		/* The default value depends on the difficulty level */
 		switch ((_game_mode == GM_MENU) ? _settings_newgame.difficulty.diff_level : _settings_game.difficulty.diff_level) {
@@ -416,11 +376,6 @@ int AIInfo::GetSettingDefaultValue(const
 	return 0;
 }
 
-const char *AILibrary::GetCategory()
-{
-	return this->category;
-}
-
 /* static */ SQInteger AILibrary::Import(HSQUIRRELVM vm)
 {
 	SQConvert::SQAutoFreePointers ptr;
diff --git a/src/ai/ai_info.hpp b/src/ai/ai_info.hpp
--- a/src/ai/ai_info.hpp
+++ b/src/ai/ai_info.hpp
@@ -47,52 +47,52 @@ public:
 	/**
 	 * Get the Author of the AI.
 	 */
-	const char *GetAuthor();
+	const char *GetAuthor() const { return this->author; }
 
 	/**
 	 * Get the Name of the AI.
 	 */
-	const char *GetName();
+	const char *GetName() const { return this->name; }
 
 	/**
 	 * Get the 4 character long short name of the AI.
 	 */
-	const char *GetShortName();
+	const char *GetShortName() const { return this->short_name; }
 
 	/**
 	 * Get the description of the AI.
 	 */
-	const char *GetDescription();
+	const char *GetDescription() const { return this->description; }
 
 	/**
 	 * Get the version of the AI.
 	 */
-	int GetVersion();
+	int GetVersion() const { return this->version; }
 
 	/**
 	 * Get the settings of the AI.
 	 */
-	void GetSettings();
+	void GetSettings() const;
 
 	/**
 	 * Get the date of the AI.
 	 */
-	const char *GetDate();
+	const char *GetDate() const { return this->date; }
 
 	/**
 	 * Get the name of the instance of the AI to create.
 	 */
-	const char *GetInstanceName();
+	const char *GetInstanceName() const { return this->instance_name; }
 
 	/**
 	 * Get the filename of the main.nut script.
 	 */
-	const char *GetMainScript();
+	const char *GetMainScript() const { return this->main_script; }
 
 	/**
 	 * Check if a given method exists.
 	 */
-	bool CheckMethod(const char *name);
+	bool CheckMethod(const char *name) const;
 
 	/**
 	 * Process the creation of a FileInfo object.
@@ -128,17 +128,17 @@ public:
 	/**
 	 * Get the config list for this AI.
 	 */
-	const AIConfigItemList *GetConfigList();
+	const AIConfigItemList *GetConfigList() const;
 
 	/**
 	 * Get the description of a certain ai config option.
 	 */
-	const AIConfigItem *GetConfigItem(const char *name);
+	const AIConfigItem *GetConfigItem(const char *name) const;
 
 	/**
 	 * Check if we can start this AI.
 	 */
-	bool CanLoadFromVersion(int version);
+	bool CanLoadFromVersion(int version) const;
 
 	/**
 	 * Set a setting.
@@ -153,7 +153,7 @@ public:
 	/**
 	 * Get the default value for a setting.
 	 */
-	int GetSettingDefaultValue(const char *name);
+	int GetSettingDefaultValue(const char *name) const;
 
 private:
 	AIConfigItemList config_list;
@@ -175,7 +175,7 @@ public:
 	/**
 	 * Get the category this library is in.
 	 */
-	const char *GetCategory();
+	const char *GetCategory() const { return this->category; }
 
 private:
 	const char *category;