diff --git a/include/m/m_vec.h b/include/m/m_vec.h
index d58a0ab8..f7ba025d 100644
--- a/include/m/m_vec.h
+++ b/include/m/m_vec.h
@@ -60,6 +60,10 @@ public:
         return (Vec *)&x;
     }
 
+    operator EGG::Vector3f *() {
+        return (EGG::Vector3f *)&x;
+    }
+
     /// @brief Const Vec cast operator.
     operator const Vec *() const {
         return (const Vec *)&x;
diff --git a/src/REL/d/t/d_t_sound_area.cpp b/src/REL/d/t/d_t_sound_area.cpp
index 63611a2f..5a62bad7 100644
--- a/src/REL/d/t/d_t_sound_area.cpp
+++ b/src/REL/d/t/d_t_sound_area.cpp
@@ -143,7 +143,7 @@ struct UnkStruct {
 
 extern "C" void fn_80337EA0(UnkStruct *);
 extern "C" void fn_80337EF0(UnkStruct *, mVec3_c&, mVec3_c&, f32);
-extern "C" int fn_8032BFB0(UnkStruct *, mVec3_c&, f32*, f32&, int);
+extern "C" int fn_8032BFB0(UnkStruct *, EGG::Vector3f&, f32*, f32&, int);
 
 // ???
 bool dTgSndAr_c::checkAlg3(const mVec3_c &pos) {
@@ -152,7 +152,7 @@ bool dTgSndAr_c::checkAlg3(const mVec3_c &pos) {
 
     f32 radius = scale.x * 100.0f;
     radius = radius * radius;
-    mVec3_c a = pos;
+    EGG::Vector3f a = pos;
     fn_80337EA0(&unk);
 
     mVec3_c b = *mRail.getPntPosForIndex(0);