diff --git a/Source/Glide64/Settings.cpp b/Source/Glide64/Settings.cpp
index c4ccceee1..0bca1df31 100644
--- a/Source/Glide64/Settings.cpp
+++ b/Source/Glide64/Settings.cpp
@@ -62,7 +62,7 @@ CSettings::CSettings() :
     // Special fixes
     m_fast_crc(false),
     m_alt_tex_size(false),
-use_sts1_only(0),
+    m_use_sts1_only(false),
 flame_corona(0), //hack for zeldas flame's corona
 increase_texrect_edge(0), // add 1 to lower right corner coordinates of texrect
 decrease_fillrect_edge(0), // sub 1 from lower right corner coordinates of fillrect
@@ -160,7 +160,7 @@ void CSettings::RegisterSettings(void)
     general_setting(Set_fb_render_default, "fb_render", false);
 
     game_setting(Set_alt_tex_size, "alt_tex_size", false);
-    game_setting(Set_use_sts1_only, "use_sts1_only", 0);
+    game_setting(Set_use_sts1_only, "use_sts1_only", false);
     game_setting(Set_force_calc_sphere, "force_calc_sphere", 0);
     game_setting(Set_correct_viewport, "correct_viewport", 0);
     game_setting(Set_increase_texrect_edge, "increase_texrect_edge", 0);
@@ -713,7 +713,7 @@ void CSettings::ReadGameSettings(const char * name)
     }
 
     m_alt_tex_size = GetSetting(Set_alt_tex_size) != 0;
-    g_settings->use_sts1_only = GetSetting(Set_use_sts1_only);
+    m_use_sts1_only = GetSetting(Set_use_sts1_only) != 0;
     g_settings->force_calc_sphere = GetSetting(Set_force_calc_sphere);
     g_settings->correct_viewport = GetSetting(Set_correct_viewport);
     g_settings->increase_texrect_edge = GetSetting(Set_increase_texrect_edge);
diff --git a/Source/Glide64/Settings.h b/Source/Glide64/Settings.h
index d529fc6b9..6ffb7f382 100644
--- a/Source/Glide64/Settings.h
+++ b/Source/Glide64/Settings.h
@@ -236,7 +236,7 @@ public:
     // Special fixes
     inline bool fast_crc(void) const { return m_fast_crc; }
     inline bool alt_tex_size(void) const { return m_alt_tex_size; }
-    int use_sts1_only;
+    inline bool use_sts1_only(void) const { return m_use_sts1_only; }
     int flame_corona; //hack for zeldas flame's corona
     int increase_texrect_edge; // add 1 to lower right corner coordinates of texrect
     int decrease_fillrect_edge; // sub 1 from lower right corner coordinates of fillrect
@@ -355,6 +355,7 @@ private:
     ucode_t m_ucode;
     bool m_fast_crc;
     bool m_alt_tex_size;
+    bool m_use_sts1_only;
     StippleMode_t m_stipple_mode;
     hacks_t m_hacks;
 };
diff --git a/Source/Glide64/rdp.cpp b/Source/Glide64/rdp.cpp
index 708ed1649..8cf698da5 100644
--- a/Source/Glide64/rdp.cpp
+++ b/Source/Glide64/rdp.cpp
@@ -1643,7 +1643,7 @@ static void rdp_settilesize()
     else if (wrong_tile == (int)tile)
         wrong_tile = -1;
 
-    if (g_settings->use_sts1_only)
+    if (g_settings->use_sts1_only())
     {
         // ** USE FIRST SETTILESIZE ONLY **
         // This option helps certain textures while using the 'Alternate texture size method',