diff --git a/src/Gui/DlgPreferencePackManagementImp.cpp b/src/Gui/DlgPreferencePackManagementImp.cpp
index a1a0dad41a52..50f3982f21e4 100644
--- a/src/Gui/DlgPreferencePackManagementImp.cpp
+++ b/src/Gui/DlgPreferencePackManagementImp.cpp
@@ -54,7 +54,7 @@ void DlgPreferencePackManagementImp::showEvent(QShowEvent* event)
     // but can only disable individual installed packs (though we can completely uninstall the pack's
     // containing Addon by redirecting to the Addon Manager).
     auto savedPreferencePacksDirectory = fs::path(App::Application::getUserAppDataDir()) / "SavedPreferencePacks";
-    auto modDirectory = fs::path(App::Application::getUserAppDataDir()) / "Mod";
+    auto modDirectories = Application::Instance->prefPackManager()->modPaths();
     auto resourcePath = fs::path(App::Application::getResourceDir()) / "Gui" / "PreferencePacks";
 
     // The displayed tree has two levels: at the toplevel is either "User-Saved Packs" or the name
@@ -66,12 +66,14 @@ void DlgPreferencePackManagementImp::showEvent(QShowEvent* event)
     auto builtinPacks = getPacksFromDirectory(resourcePath);
 
     std::map<std::string, std::vector<std::string>> installedPacks;
-    if (fs::exists(modDirectory) && fs::is_directory(modDirectory)) {
-        for (const auto& mod : fs::directory_iterator(modDirectory)) {
-            auto packs = getPacksFromDirectory(mod);
-            if (!packs.empty()) {
-                auto modName = mod.path().filename().string();
-                installedPacks.emplace(modName, packs);
+    for (const auto& modDirectory : modDirectories) {
+        if (fs::exists(modDirectory) && fs::is_directory(modDirectory)) {
+            for (const auto& mod : fs::directory_iterator(modDirectory)) {
+                auto packs = getPacksFromDirectory(mod);
+                if (!packs.empty()) {
+                    auto modName = mod.path().filename().string();
+                    installedPacks.emplace(modName, packs);
+                }
             }
         }
     }
diff --git a/src/Gui/PreferencePackManager.cpp b/src/Gui/PreferencePackManager.cpp
index 6fab14694d14..2328bcb04d81 100644
--- a/src/Gui/PreferencePackManager.cpp
+++ b/src/Gui/PreferencePackManager.cpp
@@ -30,6 +30,7 @@
 #endif
 
 #include <boost/filesystem.hpp>
+#include <boost/algorithm/string.hpp>
 #include <QDir>
 
 #include "PreferencePackManager.h"
@@ -134,12 +135,11 @@ void PreferencePack::applyConfigChanges() const
 }
 
 PreferencePackManager::PreferencePackManager()
+    : _preferencePackPaths(modPaths())
 {
-    auto modPath = fs::path(Base::FileInfo::stringToPath(App::Application::getUserAppDataDir())) / "Mod";
     auto savedPath = fs::path(Base::FileInfo::stringToPath(App::Application::getUserAppDataDir())) / "SavedPreferencePacks";
     auto resourcePath = fs::path(Base::FileInfo::stringToPath(App::Application::getResourceDir())) / "Gui" / "PreferencePacks";
-    _preferencePackPaths.push_back(resourcePath);
-    _preferencePackPaths.push_back(modPath);
+    _preferencePackPaths.insert(_preferencePackPaths.begin(), resourcePath);
     _preferencePackPaths.push_back(savedPath);
     rescan();
 
@@ -232,6 +232,26 @@ void Gui::PreferencePackManager::importConfig(const std::string& packName,
     rescan();
 }
 
+// TODO(Shvedov): Is this suitable place for this method? It is more generic,
+// and maybe more suitable place at Application?
+std::vector<boost::filesystem::path> Gui::PreferencePackManager::modPaths() const
+{
+    auto userModPath = fs::path(Base::FileInfo::stringToPath(App::Application::getUserAppDataDir())) / "Mod";
+
+    auto& config = App::Application::Config();
+    auto additionalModules = config.find("AdditionalModulePaths");
+    std::vector<boost::filesystem::path> result;
+
+    if (additionalModules != config.end()) {
+        boost::split(result,
+                     additionalModules->second,
+                     boost::is_any_of(";"),
+                     boost::token_compress_on);
+    }
+    result.emplace_back(userModPath);
+    return result;
+}
+
 void Gui::PreferencePackManager::FindPreferencePacksInPackage(const fs::path &mod)
 {
     try {
@@ -528,7 +548,6 @@ std::vector<PreferencePackManager::TemplateFile> PreferencePackManager::template
     // (alternate spellings are provided for packages using CamelCase and snake_case, and both major English dialects)
 
     auto resourcePath = fs::path(Base::FileInfo::stringToPath(App::Application::getResourceDir())) / "Gui";
-    auto modPath = fs::path(Base::FileInfo::stringToPath(App::Application::getUserAppDataDir())) / "Mod";
 
     std::string group = "Built-In";
     if (fs::exists(resourcePath) && fs::is_directory(resourcePath)) {
@@ -536,11 +555,13 @@ std::vector<PreferencePackManager::TemplateFile> PreferencePackManager::template
         std::copy(localFiles.begin(), localFiles.end(), std::back_inserter(_templateFiles));
     }
 
-    if (fs::exists(modPath) && fs::is_directory(modPath)) {
-        for (const auto& mod : fs::directory_iterator(modPath)) {
-            group = Base::FileInfo::pathToString(mod.path().filename());
-            const auto localFiles = scanForTemplateFiles(group, mod);
-            std::copy(localFiles.begin(), localFiles.end(), std::back_inserter(_templateFiles));
+    for (const auto& modPath : modPaths()) {
+        if (fs::exists(modPath) && fs::is_directory(modPath)) {
+            for (const auto& mod : fs::directory_iterator(modPath)) {
+                group = Base::FileInfo::pathToString(mod.path().filename());
+                const auto localFiles = scanForTemplateFiles(group, mod);
+                std::copy(localFiles.begin(), localFiles.end(), std::back_inserter(_templateFiles));
+            }
         }
     }
 
diff --git a/src/Gui/PreferencePackManager.h b/src/Gui/PreferencePackManager.h
index 301e160df2fc..e5776e47a02d 100644
--- a/src/Gui/PreferencePackManager.h
+++ b/src/Gui/PreferencePackManager.h
@@ -191,6 +191,11 @@ namespace Gui {
          */
         void importConfig(const std::string &packName, const boost::filesystem::path &path);
 
+        /**
+         * Get a list of all mod directories.
+         */
+        std::vector<boost::filesystem::path> modPaths() const;
+
     private:
 
         void FindPreferencePacksInPackage(const boost::filesystem::path& mod);