diff --git a/ctru-rs/src/applets/swkbd.rs b/ctru-rs/src/applets/swkbd.rs
index 5153c25..b5aaaf1 100644
--- a/ctru-rs/src/applets/swkbd.rs
+++ b/ctru-rs/src/applets/swkbd.rs
@@ -213,7 +213,7 @@ impl Default for Swkbd {
     }
 }
 
-from_type_to_u32!(Kind);
-from_type_to_u32!(Button);
-from_type_to_u32!(Error);
-from_type_to_i32!(ValidInput);
+from_impl!(Kind, ctru_sys::SwkbdType);
+from_impl!(Button, ctru_sys::SwkbdButton);
+from_impl!(Error, ctru_sys::SwkbdResult);
+from_impl!(ValidInput, i32);
diff --git a/ctru-rs/src/lib.rs b/ctru-rs/src/lib.rs
index a841e78..e733d5a 100644
--- a/ctru-rs/src/lib.rs
+++ b/ctru-rs/src/lib.rs
@@ -15,41 +15,11 @@ extern crate pthread_3ds;
 #[cfg(feature = "big-stack")]
 static __stacksize__: usize = 2 * 1024 * 1024; // 2MB
 
-macro_rules! from_type_to_u8 {
-    ($from_type:ty) => {
-        impl From<$from_type> for u8 {
+macro_rules! from_impl {
+    ($from_type:ty, $into_type:ty) => {
+        impl From<$from_type> for $into_type {
             fn from(v: $from_type) -> Self {
-                v as u8
-            }
-        }
-    };
-}
-
-macro_rules! from_type_to_u16 {
-    ($from_type:ty) => {
-        impl From<$from_type> for u16 {
-            fn from(v: $from_type) -> Self {
-                v as u16
-            }
-        }
-    };
-}
-
-macro_rules! from_type_to_u32 {
-    ($from_type:ty) => {
-        impl From<$from_type> for u32 {
-            fn from(v: $from_type) -> Self {
-                v as u32
-            }
-        }
-    };
-}
-
-macro_rules! from_type_to_i32 {
-    ($from_type:ty) => {
-        impl From<$from_type> for i32 {
-            fn from(v: $from_type) -> Self {
-                v as i32
+                v as $into_type
             }
         }
     };
diff --git a/ctru-rs/src/services/cam.rs b/ctru-rs/src/services/cam.rs
index bca6c65..5046dec 100644
--- a/ctru-rs/src/services/cam.rs
+++ b/ctru-rs/src/services/cam.rs
@@ -794,13 +794,13 @@ impl Drop for Cam {
     }
 }
 
-from_type_to_u32!(FlipMode);
-from_type_to_u32!(ViewSize);
-from_type_to_u32!(FrameRate);
-from_type_to_u32!(WhiteBalance);
-from_type_to_u32!(PhotoMode);
-from_type_to_u32!(Effect);
-from_type_to_u32!(Contrast);
-from_type_to_u32!(LensCorrection);
-from_type_to_u32!(OutputFormat);
-from_type_to_u32!(ShutterSound);
+from_impl!(FlipMode, ctru_sys::CAMU_Flip);
+from_impl!(ViewSize, ctru_sys::CAMU_Size);
+from_impl!(FrameRate, ctru_sys::CAMU_FrameRate);
+from_impl!(WhiteBalance, ctru_sys::CAMU_WhiteBalance);
+from_impl!(PhotoMode, ctru_sys::CAMU_PhotoMode);
+from_impl!(Effect, ctru_sys::CAMU_Effect);
+from_impl!(Contrast, ctru_sys::CAMU_Contrast);
+from_impl!(LensCorrection, ctru_sys::CAMU_LensCorrection);
+from_impl!(OutputFormat, ctru_sys::CAMU_OutputFormat);
+from_impl!(ShutterSound, ctru_sys::CAMU_ShutterSoundType);
diff --git a/ctru-rs/src/services/cfgu.rs b/ctru-rs/src/services/cfgu.rs
index 12857c6..3f268c7 100644
--- a/ctru-rs/src/services/cfgu.rs
+++ b/ctru-rs/src/services/cfgu.rs
@@ -115,9 +115,9 @@ impl Drop for Cfgu {
     }
 }
 
-from_type_to_u8!(Region);
-from_type_to_u8!(Language);
-from_type_to_u8!(SystemModel);
+from_impl!(Region, u8);
+from_impl!(Language, u8);
+from_impl!(SystemModel, u8);
 
 impl TryFrom<u8> for Region {
     type Error = ();
diff --git a/ctru-rs/src/services/fs.rs b/ctru-rs/src/services/fs.rs
index 512debb..45f9efb 100644
--- a/ctru-rs/src/services/fs.rs
+++ b/ctru-rs/src/services/fs.rs
@@ -1018,6 +1018,6 @@ impl Drop for Dir {
     }
 }
 
-from_type_to_u32!(FsMediaType);
-from_type_to_u32!(PathType);
-from_type_to_u32!(ArchiveID);
+from_impl!(FsMediaType, ctru_sys::FS_MediaType);
+from_impl!(PathType, ctru_sys::FS_PathType);
+from_impl!(ArchiveID, ctru_sys::FS_ArchiveID);
diff --git a/ctru-rs/src/services/gfx.rs b/ctru-rs/src/services/gfx.rs
index f4a580a..40d4740 100644
--- a/ctru-rs/src/services/gfx.rs
+++ b/ctru-rs/src/services/gfx.rs
@@ -104,14 +104,15 @@ pub struct RawFrameBuffer<'screen> {
 }
 
 #[derive(Copy, Clone, Debug)]
+#[repr(u32)]
 /// Side of top screen framebuffer
 ///
 /// The top screen of the 3DS can have two separate sets of framebuffers to support its 3D functionality
 pub enum Side {
     /// The left framebuffer. This framebuffer is also the one used when 3D is disabled
-    Left,
+    Left = ctru_sys::GFX_LEFT,
     /// The right framebuffer
-    Right,
+    Right = ctru_sys::GFX_RIGHT,
 }
 
 /// A handle to libctru's gfx module. This module is a wrapper around the GSPGPU service that
@@ -283,7 +284,7 @@ impl Screen for BottomScreen {
     }
 }
 
-from_type_to_u32!(Side);
+from_impl!(Side, ctru_sys::gfx3dSide_t);
 
 #[cfg(test)]
 mod tests {
diff --git a/ctru-rs/src/services/gspgpu.rs b/ctru-rs/src/services/gspgpu.rs
index 29ca102..234c088 100644
--- a/ctru-rs/src/services/gspgpu.rs
+++ b/ctru-rs/src/services/gspgpu.rs
@@ -65,5 +65,5 @@ impl From<ctru_sys::GSPGPU_FramebufferFormat> for FramebufferFormat {
     }
 }
 
-from_type_to_u32!(FramebufferFormat);
-from_type_to_u32!(Event);
+from_impl!(FramebufferFormat, ctru_sys::GSPGPU_FramebufferFormat);
+from_impl!(Event, ctru_sys::GSPGPU_Event);
diff --git a/ctru-rs/src/services/ndsp/mod.rs b/ctru-rs/src/services/ndsp/mod.rs
index 832e586..5ab9e20 100644
--- a/ctru-rs/src/services/ndsp/mod.rs
+++ b/ctru-rs/src/services/ndsp/mod.rs
@@ -341,6 +341,6 @@ impl Drop for Ndsp {
     }
 }
 
-from_type_to_u32!(InterpolationType);
-from_type_to_u32!(OutputMode);
-from_type_to_u16!(AudioFormat);
+from_impl!(InterpolationType, ctru_sys::ndspInterpType);
+from_impl!(OutputMode, ctru_sys::ndspOutputMode);
+from_impl!(AudioFormat, u16);
diff --git a/ctru-rs/src/services/ps.rs b/ctru-rs/src/services/ps.rs
index 552a34e..a14f2c4 100644
--- a/ctru-rs/src/services/ps.rs
+++ b/ctru-rs/src/services/ps.rs
@@ -70,8 +70,8 @@ impl Drop for Ps {
     }
 }
 
-from_type_to_u32!(AESAlgorithm);
-from_type_to_u32!(AESKeyType);
+from_impl!(AESAlgorithm, ctru_sys::PS_AESAlgorithm);
+from_impl!(AESKeyType, ctru_sys::PS_AESKeyType);
 
 #[cfg(test)]
 mod tests {