diff --git a/resources/templates/es_systems.cfg_macos b/resources/templates/es_systems.cfg_macos
index 5e679f129..8773c021a 100644
--- a/resources/templates/es_systems.cfg_macos
+++ b/resources/templates/es_systems.cfg_macos
@@ -917,7 +917,7 @@
     <extension>.mdx .MDX .md .MD .smd .SMD .gen .GEN .bin .BIN .cue .CUE .iso .ISO .sms .SMS .gg .GG .sg .SG .68k .68K .chd .CHD .7z .7Z .zip .ZIP</extension>
     <command>/Applications/RetroArch.app/Contents/MacOS/RetroArch -L %EMUPATH%/../Resources/cores/genesis_plus_gx_libretro.dylib %ROM%</command>
     <platform>sg-1000</platform>
-    <theme>sg1000</theme>
+    <theme>sg-1000</theme>
   </system>
   <system>
     <name>snes</name>
diff --git a/resources/templates/es_systems.cfg_unix b/resources/templates/es_systems.cfg_unix
index 30b9415b5..b4ac78f0a 100644
--- a/resources/templates/es_systems.cfg_unix
+++ b/resources/templates/es_systems.cfg_unix
@@ -917,7 +917,7 @@
     <extension>.mdx .MDX .md .MD .smd .SMD .gen .GEN .bin .BIN .cue .CUE .iso .ISO .sms .SMS .gg .GG .sg .SG .68k .68K .chd .CHD .7z .7Z .zip .ZIP</extension>
     <command>retroarch -L %COREPATH%/genesis_plus_gx_libretro.so %ROM%</command>
     <platform>sg-1000</platform>
-    <theme>sg1000</theme>
+    <theme>sg-1000</theme>
   </system>
   <system>
     <name>snes</name>
diff --git a/resources/templates/es_systems.cfg_unix_flatpak b/resources/templates/es_systems.cfg_unix_flatpak
index ec08bceaa..6ecea9b91 100644
--- a/resources/templates/es_systems.cfg_unix_flatpak
+++ b/resources/templates/es_systems.cfg_unix_flatpak
@@ -917,7 +917,7 @@
     <extension>.mdx .MDX .md .MD .smd .SMD .gen .GEN .bin .BIN .cue .CUE .iso .ISO .sms .SMS .gg .GG .sg .SG .68k .68K .chd .CHD .7z .7Z .zip .ZIP</extension>
     <command>flatpak run org.libretro.RetroArch -L %COREPATH%/genesis_plus_gx_libretro.so %ROM%</command>
     <platform>sg-1000</platform>
-    <theme>sg1000</theme>
+    <theme>sg-1000</theme>
   </system>
   <system>
     <name>snes</name>
diff --git a/resources/templates/es_systems.cfg_windows b/resources/templates/es_systems.cfg_windows
index cffaca31b..46e081cc2 100644
--- a/resources/templates/es_systems.cfg_windows
+++ b/resources/templates/es_systems.cfg_windows
@@ -917,7 +917,7 @@
     <extension>.mdx .MDX .md .MD .smd .SMD .gen .GEN .bin .BIN .cue .CUE .iso .ISO .sms .SMS .gg .GG .sg .SG .68k .68K .chd .CHD .7z .7Z .zip .ZIP</extension>
     <command>retroarch.exe -L %EMUPATH%\cores\genesis_plus_gx_libretro.dll %ROM%</command>
     <platform>sg-1000</platform>
-    <theme>sg1000</theme>
+    <theme>sg-1000</theme>
   </system>
   <system>
     <name>snes</name>
diff --git a/themes/rbsimple-DE/sg1000/colors.xml b/themes/rbsimple-DE/sg-1000/colors.xml
similarity index 100%
rename from themes/rbsimple-DE/sg1000/colors.xml
rename to themes/rbsimple-DE/sg-1000/colors.xml
diff --git a/themes/rbsimple-DE/sg1000/images/console.svg b/themes/rbsimple-DE/sg-1000/images/console.svg
similarity index 100%
rename from themes/rbsimple-DE/sg1000/images/console.svg
rename to themes/rbsimple-DE/sg-1000/images/console.svg
diff --git a/themes/rbsimple-DE/sg1000/images/consolegame.svg b/themes/rbsimple-DE/sg-1000/images/consolegame.svg
similarity index 100%
rename from themes/rbsimple-DE/sg1000/images/consolegame.svg
rename to themes/rbsimple-DE/sg-1000/images/consolegame.svg
diff --git a/themes/rbsimple-DE/sg1000/images/controller.svg b/themes/rbsimple-DE/sg-1000/images/controller.svg
similarity index 100%
rename from themes/rbsimple-DE/sg1000/images/controller.svg
rename to themes/rbsimple-DE/sg-1000/images/controller.svg
diff --git a/themes/rbsimple-DE/sg1000/images/game.svg b/themes/rbsimple-DE/sg-1000/images/game.svg
similarity index 100%
rename from themes/rbsimple-DE/sg1000/images/game.svg
rename to themes/rbsimple-DE/sg-1000/images/game.svg
diff --git a/themes/rbsimple-DE/sg1000/images/logo.svg b/themes/rbsimple-DE/sg-1000/images/logo.svg
similarity index 100%
rename from themes/rbsimple-DE/sg1000/images/logo.svg
rename to themes/rbsimple-DE/sg-1000/images/logo.svg
diff --git a/themes/rbsimple-DE/sg1000/systeminfo.xml b/themes/rbsimple-DE/sg-1000/systeminfo.xml
similarity index 100%
rename from themes/rbsimple-DE/sg1000/systeminfo.xml
rename to themes/rbsimple-DE/sg-1000/systeminfo.xml
diff --git a/themes/rbsimple-DE/sg1000/theme.xml b/themes/rbsimple-DE/sg-1000/theme.xml
similarity index 100%
rename from themes/rbsimple-DE/sg1000/theme.xml
rename to themes/rbsimple-DE/sg-1000/theme.xml