diff --git a/desmume/src/gfx3d.cpp b/desmume/src/gfx3d.cpp
index 7e308c7d2..20c436c8e 100644
--- a/desmume/src/gfx3d.cpp
+++ b/desmume/src/gfx3d.cpp
@@ -1478,7 +1478,6 @@ static BOOL gfx3d_glBoxTest(u32 v)
 		//yuck.. cant use the sse2 accelerated ones because vert.coords is not cache aligned or something
 		//i dunno
 		
-		void _NOSSE_MatrixMultVec4x4 (const float *matrix, float *vecPtr);
 		_NOSSE_MatrixMultVec4x4(mtxCurrent[1],verts[i].coord);
 		_NOSSE_MatrixMultVec4x4(mtxCurrent[0],verts[i].coord);
 	}
diff --git a/desmume/src/matrix.h b/desmume/src/matrix.h
index 695606c64..b6a75979b 100644
--- a/desmume/src/matrix.h
+++ b/desmume/src/matrix.h
@@ -147,6 +147,9 @@ static FORCEINLINE void memset_u16_le(void* dst, u16 val)
 
 #endif
 
+// NOSSE version always used in gfx3d.cpp
+void _NOSSE_MatrixMultVec4x4 (const float *matrix, float *vecPtr);
+
 //---------------------------
 //switched SSE functions
 #ifdef ENABLE_SSE