diff --git a/services/wolf.sh b/services/wolf.sh
index 7541b28..c273cb4 100644
--- a/services/wolf.sh
+++ b/services/wolf.sh
@@ -1007,7 +1007,7 @@ block = '''    <system>
         <fullname>Texas Instruments TI-99/4A</fullname>
         <path>%ROMPATH%/ti994a</path>
         <extension>.ctg .rpk .bin</extension>
-        <command>%INJECT%=%BASENAME%.esprefix %STARTDIR%=%EMUDIR% %EMULATOR_TI99SIM% --joystick1=1 %ROM%</command>
+        <command>%INJECT%=%BASENAME%.esprefix %STARTDIR%=%EMUDIR% %EMULATOR_TI99SIM% --joystick1=1 --fullscreen %ROM%</command>
         <platform>ti99</platform>
         <theme>ti99</theme>
     </system>