diff --git a/src/core/settable.cpp b/src/core/settable.cpp
index 9d2ec132..9cd9c303 100644
--- a/src/core/settable.cpp
+++ b/src/core/settable.cpp
@@ -4,94 +4,95 @@
 #include <unordered_map>
 #include <vector>
 
-namespace
+namespace vind
 {
-    using namespace vind::core ;
-
-    std::vector<Param> default_params {
-        Param("hintkeys", "asdghklqwertyuiopzxcvbnmfj"),
+    namespace core
+    {
+        std::vector<Param> SetTable::default_params {
+            Param("hintkeys", "asdghklqwertyuiopzxcvbnmfj"),
 
-        Param("arrangewin_ignore", ""),
+            Param("arrangewin_ignore", ""),
 
-        Param("autotrack_popup", false),
+            Param("autotrack_popup", false),
 
-        Param("blockstylecaret", false),
-        Param("blockstylecaret_mode", "solid"),
-        Param("blockstylecaret_width", 15),
+            Param("blockstylecaret", false),
+            Param("blockstylecaret_mode", "solid"),
+            Param("blockstylecaret_width", 15),
 
-        Param("charbreak", "grapheme"),
-        Param("charcache", false),
+            Param("charbreak", "grapheme"),
+            Param("charcache", false),
 
-        Param("cmd_bgcolor", "323232"),
-        Param("cmd_fadeout", 5),
-        Param("cmd_fontcolor", "c8c8c8"),
-        Param("cmd_fontextra", 1),
-        Param("cmd_fontname", "Consolas"),
-        Param("cmd_fontsize", 23),
-        Param("cmd_fontweight", 400),
-        Param("cmd_monitor", "primary"),
-        Param("cmd_roughpos", "LowerLeft"),
-        Param("cmd_xmargin", 32),
-        Param("cmd_ymargin", 96),
+            Param("cmd_bgcolor", "323232"),
+            Param("cmd_fadeout", 5),
+            Param("cmd_fontcolor", "c8c8c8"),
+            Param("cmd_fontextra", 1),
+            Param("cmd_fontname", "Consolas"),
+            Param("cmd_fontsize", 23),
+            Param("cmd_fontweight", 400),
+            Param("cmd_monitor", "primary"),
+            Param("cmd_roughpos", "LowerLeft"),
+            Param("cmd_xmargin", 32),
+            Param("cmd_ymargin", 96),
 
-        Param("cursor_accel", 90),
-        Param("cursor_resolution", 250),
+            Param("cursor_accel", 90),
+            Param("cursor_resolution", 250),
 
-        Param("dedicate_to_window", false),
+            Param("dedicate_to_window", false),
 
-        Param("easyclick_bgcolor", "323232"),
-        Param("easyclick_fontcolor", "c8c8c8"),
-        Param("easyclick_fontname", "Consolas"),
-        Param("easyclick_fontsize", 14),
-        Param("easyclick_fontweight", 500),
+            Param("easyclick_bgcolor", "323232"),
+            Param("easyclick_fontcolor", "c8c8c8"),
+            Param("easyclick_fontname", "Consolas"),
+            Param("easyclick_fontsize", 14),
+            Param("easyclick_fontweight", 500),
 
-        Param("gridmove_bgcolor", "323232"),
-        Param("gridmove_fontcolor", "c8c8c8"),
-        Param("gridmove_fontname", "Consolas"),
-        Param("gridmove_fontsize", 14),
-        Param("gridmove_fontweight", 500),
-        Param("gridmove_size", "12x8"),
+            Param("gridmove_bgcolor", "323232"),
+            Param("gridmove_fontcolor", "c8c8c8"),
+            Param("gridmove_fontname", "Consolas"),
+            Param("gridmove_fontsize", 14),
+            Param("gridmove_fontweight", 500),
+            Param("gridmove_size", "12x8"),
 
-        Param("gui_fontname", "Segoe UI"),
-        Param("gui_fontsize", 10),
+            Param("gui_fontname", "Segoe UI"),
+            Param("gui_fontsize", 10),
 
-        Param("hscroll_pageratio", 0.125f),
-        Param("hscroll_speed", 10),
+            Param("hscroll_pageratio", 0.125f),
+            Param("hscroll_speed", 10),
 
-        Param("icon_style", "icon32_flat.ico"),
+            Param("icon_style", "icon32_flat.ico"),
 
-        Param("initmode", "i"),
+            Param("initmode", "i"),
 
-        Param("jump_margin", 10),
+            Param("jump_margin", 10),
 
-        Param("keybrd_layout", ""),
+            Param("keybrd_layout", ""),
 
-        Param("listen_interval", 1.0f),
+            Param("listen_interval", 1.0f),
 
-        Param("shell", "cmd"),
-        Param("shell_startupdir", ""),
-        Param("shellcmdflag", "-c"),
+            Param("shell", "cmd"),
+            Param("shell_startupdir", ""),
+            Param("shellcmdflag", "-c"),
 
-        Param("suppress_for_vim", false),
+            Param("suppress_for_vim", false),
 
-        Param("tempdir", "~/Downloads"),
+            Param("tempdir", "~/Downloads"),
 
-        Param("uiacachebuild", false),
-        Param("uiacachebuild_lifetime", 1500),
-        Param("uiacachebuild_staybegin", 500),
-        Param("uiacachebuild_stayend", 2000),
+            Param("uiacachebuild", false),
+            Param("uiacachebuild_lifetime", 1500),
+            Param("uiacachebuild_staybegin", 500),
+            Param("uiacachebuild_stayend", 2000),
 
-        Param("vcmdline", true),
-        Param("showcmd", true),
+            Param("vcmdline", true),
+            Param("showcmd", true),
 
-        Param("vscroll_pageratio", 0.125f),
-        Param("vscroll_speed", 30),
+            Param("vscroll_pageratio", 0.125f),
+            Param("vscroll_speed", 30),
 
-        Param("window_hdelta", 100),
-        Param("window_vdelta", 100),
-        Param("window_velocity", 100),
-        Param("winresizer_initmode", 0),
-    } ;
+            Param("window_hdelta", 100),
+            Param("window_vdelta", 100),
+            Param("window_velocity", 100),
+            Param("winresizer_initmode", 0),
+        } ;
+    }
 }
 
 
@@ -114,6 +115,7 @@ namespace vind
         SetTable::SetTable()
         : pimpl(std::make_unique<Impl>())
         {
+            std::lock_guard<std::mutex> scoped_lock{pimpl->mtx_} ;
             for(const auto& param : default_params) {
                 pimpl->deftable_[param.name()] = param ;
             }
diff --git a/src/core/settable.hpp b/src/core/settable.hpp
index be862fcb..417a98cc 100644
--- a/src/core/settable.hpp
+++ b/src/core/settable.hpp
@@ -7,6 +7,7 @@
 #include <type_traits>
 #include <typeinfo>
 #include <variant>
+#include <vector>
 
 
 namespace vind
@@ -23,6 +24,8 @@ namespace vind
             explicit SetTable() ;
             virtual ~SetTable() noexcept ;
 
+            static std::vector<Param> default_params ;
+
         public:
             static SetTable& get_instance() ;