diff --git a/crates/prometeu-core/src/prometeu_os/syscalls.rs b/crates/prometeu-core/src/prometeu_os/syscalls.rs
index f55ed799..f5be87c4 100644
--- a/crates/prometeu-core/src/prometeu_os/syscalls.rs
+++ b/crates/prometeu-core/src/prometeu_os/syscalls.rs
@@ -113,12 +113,12 @@ impl Syscall {
 
     pub fn from_name(name: &str) -> Option<Self> {
         match name {
-            "system.hasCart" => Some(Self::SystemHasCart),
+            "system.hasCart" | "system.has_cart" => Some(Self::SystemHasCart),
             "gfx.clear" => Some(Self::GfxClear),
             "gfx.fillRect" | "gfx.draw_rect" => Some(Self::GfxFillRect),
             "gfx.drawLine" | "gfx.draw_line" => Some(Self::GfxDrawLine),
             "gfx.drawCircle" | "gfx.draw_circle" => Some(Self::GfxDrawCircle),
-            "fx.drawDisc" | "gfx.draw_disc" => Some(Self::GfxDrawDisc),
+            "gfx.drawDisc" | "gfx.draw_disc" => Some(Self::GfxDrawDisc),
             "gfx.drawSquare" | "gfx.draw_square" => Some(Self::GfxDrawSquare),
             "input.getPad" => Some(Self::InputGetPad),
             "input.getPadPressed" | "input.get_pad_pressed" => Some(Self::InputGetPadPressed),
diff --git a/test-cartridges/color-square/program.pbc b/test-cartridges/color-square/program.pbc
index 4cdff597..8ade8115 100644
Binary files a/test-cartridges/color-square/program.pbc and b/test-cartridges/color-square/program.pbc differ