diff --git a/src/port/interpolation/FrameInterpolation.cpp b/src/port/interpolation/FrameInterpolation.cpp
index d0e0fe0f0..c86f63089 100644
--- a/src/port/interpolation/FrameInterpolation.cpp
+++ b/src/port/interpolation/FrameInterpolation.cpp
@@ -12,6 +12,9 @@ extern "C" {
 #include "math_util.h"
 #include "math_util_2.h"
 #include "render_player.h"
+
+extern Mat4* gInterpolationMatrix;
+void mtxf_translate(Mat4, Vec3f);
 }
 /*
 Frame interpolation.
@@ -234,11 +237,6 @@ Data& append(Op op) {
     return m.emplace_back();
 }
 
-extern "C" {
-extern Mat4* gInterpolationMatrix;
-void mtxf_translate(Mat4, Vec3f);
-}
-
 MtxF* Matrix_GetCurrent() {
     return (MtxF*) gInterpolationMatrix;
 }