diff --git a/ctru-rs/examples/gfx-3d-mode.rs b/ctru-rs/examples/gfx-3d-mode.rs
index 4108694..596630e 100644
--- a/ctru-rs/examples/gfx-3d-mode.rs
+++ b/ctru-rs/examples/gfx-3d-mode.rs
@@ -1,5 +1,5 @@
 use ctru::prelude::*;
-use ctru::services::gfx::{Screen, Side, Swap, TopScreen3D};
+use ctru::services::gfx::{Flush, Screen, Side, Swap, TopScreen3D};
 
 /// See `graphics-bitmap.rs` for details on how the image is generated.
 ///
diff --git a/ctru-rs/src/services/gfx.rs b/ctru-rs/src/services/gfx.rs
index 6bbb02d..65c23c2 100644
--- a/ctru-rs/src/services/gfx.rs
+++ b/ctru-rs/src/services/gfx.rs
@@ -89,6 +89,9 @@ impl SwappableScreen for TopScreen {}
 impl SwappableScreen for BottomScreen {}
 
 impl<S: SwappableScreen> Swap for S {
+    /// Swaps the video buffers.
+    ///
+    /// This should be used even if double buffering is disabled.
     fn swap_buffers(&mut self) {
         unsafe {
             ctru_sys::gfxScreenSwapBuffers(self.side().into(), false);
@@ -97,6 +100,7 @@ impl<S: SwappableScreen> Swap for S {
 }
 
 pub trait Flush: private::Sealed {
+    /// Flushes the video buffer for this screen.
     fn flush_buffer(&mut self);
 }
 
diff --git a/ctru-rs/src/services/hid.rs b/ctru-rs/src/services/hid.rs
index 2db0d23..79a649b 100644
--- a/ctru-rs/src/services/hid.rs
+++ b/ctru-rs/src/services/hid.rs
@@ -13,10 +13,10 @@ bitflags::bitflags! {
         const B             = ctru_sys::KEY_B;
         const SELECT        = ctru_sys::KEY_SELECT;
         const START         = ctru_sys::KEY_START;
-        const DRIGHT        = ctru_sys::KEY_DRIGHT;
-        const DLEFT         = ctru_sys::KEY_DLEFT;
-        const DUP           = ctru_sys::KEY_DUP;
-        const DDOWN         = ctru_sys::KEY_DDOWN;
+        const DPAD_RIGHT        = ctru_sys::KEY_DRIGHT;
+        const DPAD_LEFT         = ctru_sys::KEY_DLEFT;
+        const DPAD_UP           = ctru_sys::KEY_DUP;
+        const DPAD_DOWN         = ctru_sys::KEY_DDOWN;
         const R             = ctru_sys::KEY_R;
         const L             = ctru_sys::KEY_L;
         const X             = ctru_sys::KEY_X;
@@ -33,10 +33,10 @@ bitflags::bitflags! {
         const CPAD_UP       = ctru_sys::KEY_CPAD_UP;
         const CPAD_DOWN     = ctru_sys::KEY_CPAD_DOWN;
         // Convenience catch-all for the dpad and cpad
-        const UP    = KeyPad::DUP.bits()    | KeyPad::CPAD_UP.bits();
-        const DOWN  = KeyPad::DDOWN.bits()  | KeyPad::CPAD_DOWN.bits();
-        const LEFT  = KeyPad::DLEFT.bits()  | KeyPad::CPAD_LEFT.bits();
-        const RIGHT = KeyPad::DRIGHT.bits() | KeyPad::CPAD_RIGHT.bits();
+        const UP    = KeyPad::DPAD_UP.bits()    | KeyPad::CPAD_UP.bits();
+        const DOWN  = KeyPad::DPAD_DOWN.bits()  | KeyPad::CPAD_DOWN.bits();
+        const LEFT  = KeyPad::DPAD_LEFT.bits()  | KeyPad::CPAD_LEFT.bits();
+        const RIGHT = KeyPad::DPAD_RIGHT.bits() | KeyPad::CPAD_RIGHT.bits();
     }
 }
 
diff --git a/ctru-rs/src/services/mod.rs b/ctru-rs/src/services/mod.rs
index 6b9e115..1d31dea 100644
--- a/ctru-rs/src/services/mod.rs
+++ b/ctru-rs/src/services/mod.rs
@@ -34,6 +34,10 @@ cfg_if::cfg_if! {
             //! [package.metadata.cargo-3ds]
             //! romfs_dir = "romfs"
             //! ```
+
+            // If the feature is set, but no "romfs" directory was found: send an error during compilation.
+            #[cfg(feature = "romfs")]
+            compile_error!("romfs feature is enabled but no romfs found!");
         }
     }
 }