diff --git a/include/nw4r/lyt/layout.h b/include/nw4r/lyt/layout.h
index cd2e78a..f13ee3b 100644
--- a/include/nw4r/lyt/layout.h
+++ b/include/nw4r/lyt/layout.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <common.h>
+#include <wii/mem.h>
 #include <msl/new.h>
 #include <nw4r/lyt/animation.h>
 #include <nw4r/lyt/pane.h>
diff --git a/include/nw4r/lyt/material.h b/include/nw4r/lyt/material.h
index 2c891ef..47edaee 100644
--- a/include/nw4r/lyt/material.h
+++ b/include/nw4r/lyt/material.h
@@ -1,11 +1,14 @@
 #pragma once
 
 #include <common.h>
+#include <wii/gx.h>
 #include <nw4r/ut/linkList.h>
 
 namespace nw4r {
 namespace lyt {
 
+USING(wii::gx::GXColorS10)
+
 class Material
 {
 public:
diff --git a/include/nw4r/math/types.h b/include/nw4r/math/types.h
index 47d88f9..af6e627 100644
--- a/include/nw4r/math/types.h
+++ b/include/nw4r/math/types.h
@@ -10,6 +10,9 @@
 namespace nw4r {
 namespace math {
 
+USING(wii::mtx::Vec3)
+USING(wii::mtx::Mtx34)
+
 struct _VEC2
 {
     f32 x, y;
@@ -18,10 +21,10 @@ struct _VEC2
 struct VEC2 : _VEC2
 {
     VEC2() {}
-    VEC2(f32 x, f32 y)
+    VEC2(f32 x_, f32 y_)
     {
-        this->x = x;
-        this->y = y;
+        this->x = x_;
+        this->y = y_;
     }
 
     operator f32*() { return reinterpret_cast<f32*>(this); }
@@ -37,11 +40,11 @@ struct _VEC3
 struct VEC3 : _VEC3
 {
     VEC3() {}
-    VEC3(f32 x, f32 y, f32 z)
+    VEC3(f32 x_, f32 y_, f32 z_)
     {
-        this->x = x;
-        this->y = y;
-        this->z = z;
+        this->x = x_;
+        this->y = y_;
+        this->z = z_;
     }
 
     operator Vec3*() { return reinterpret_cast<Vec3*>(this); }
@@ -53,12 +56,14 @@ struct _MTX34
 {
     union
     {
+#ifdef DECOMP
         struct
         {
             f32 _00, _01, _02, _03,
                 _10, _11, _12, _13,
                 _20, _21, _22, _23;
         };
+#endif
         f32 m[3][4];
         f32 a[3 * 4];
         Mtx34 mtx;
@@ -72,6 +77,7 @@ struct MTX34 : public _MTX34
 
     MTX34() {}
 
+#ifdef DECOMP
     // clang-format off
     MTX34(f32 f00, f32 f01, f32 f02, f32 f03,
           f32 f10, f32 f11, f32 f12, f32 f13,
@@ -81,6 +87,7 @@ struct MTX34 : public _MTX34
         _20 = f20; _21 = f21; _22 = f22; _23 = f23;
     }
     // clang-format on
+#endif
 
     operator MtxRef() { return mtx; }
     operator MtxRefConst() const { return mtx; }
diff --git a/include/nw4r/ut/color.h b/include/nw4r/ut/color.h
index 8fe4cc2..157cda9 100644
--- a/include/nw4r/ut/color.h
+++ b/include/nw4r/ut/color.h
@@ -10,6 +10,8 @@
 namespace nw4r {
 namespace ut {
 
+USING(wii::gx::GXColor)
+
 class Color : public GXColor {
 public:
     Color() { *this = 0xFFFFFFFF; }
diff --git a/include/nw4r/ut/linkList.h b/include/nw4r/ut/linkList.h
index 522cbba..cb446b8 100644
--- a/include/nw4r/ut/linkList.h
+++ b/include/nw4r/ut/linkList.h
@@ -168,11 +168,11 @@ template <typename TIter> class ReverseIterator {
         return *this;
     }
 
-    const TIter::TElem* operator->() const {
+    const typename TIter::TElem* operator->() const {
         return &this->operator*();
     }
 
-    TIter::TElem& operator*() const {
+    typename TIter::TElem& operator*() const {
         TIter it = mCurrent;
         --it;
         return *it;
diff --git a/include/spm/camdrv.h b/include/spm/camdrv.h
index b361c11..3546028 100644
--- a/include/spm/camdrv.h
+++ b/include/spm/camdrv.h
@@ -11,6 +11,7 @@
 
 CPP_WRAPPER(spm::camdrv)
 
+USING(wii::gx::GXProjectionType)
 USING(wii::mtx::Vec3)
 USING(wii::mtx::Mtx34)
 USING(wii::mtx::Mtx44)
diff --git a/include/spm/fadedrv.h b/include/spm/fadedrv.h
index 7bfa49d..344fe84 100644
--- a/include/spm/fadedrv.h
+++ b/include/spm/fadedrv.h
@@ -5,7 +5,7 @@
 
 CPP_WRAPPER(spm::fadedrv)
 
-USING(wii::GX::GXColor)
+USING(wii::gx::GXColor)
 
 void fadeInit();
 void fadeEntry(u32 transitionType, s32 param_2, GXColor colour);