diff --git a/libretro-common/gfx/math/matrix_4x4.c b/libretro-common/gfx/math/matrix_4x4.c
index b8dcfce3a6..2ff6198bd7 100644
--- a/libretro-common/gfx/math/matrix_4x4.c
+++ b/libretro-common/gfx/math/matrix_4x4.c
@@ -25,6 +25,15 @@
 
 #include <gfx/math/matrix_4x4.h>
 
+void matrix_4x4_copy(math_matrix_4x4 *dst, const math_matrix_4x4 *src)
+{
+   unsigned i, j;
+
+   for (i = 0; i < 4; i++)
+      for (j = 0; j < 4; j++)
+      MAT_ELEM_4X4(*dst, i, j) = MAT_ELEM_4X4(*src, i, j);
+}
+
 /*
  * Sets mat to an identity matrix
  */
diff --git a/libretro-common/include/gfx/math/matrix_4x4.h b/libretro-common/include/gfx/math/matrix_4x4.h
index 59620830e4..ab6f16e838 100644
--- a/libretro-common/include/gfx/math/matrix_4x4.h
+++ b/libretro-common/include/gfx/math/matrix_4x4.h
@@ -35,6 +35,7 @@ typedef struct math_matrix_4x4
 
 #define MAT_ELEM_4X4(mat, r, c) ((mat).data[4 * (c) + (r)])
 
+void matrix_4x4_copy(math_matrix_4x4 *dst, const math_matrix_4x4 *src);
 void matrix_4x4_identity(math_matrix_4x4 *mat);
 void matrix_4x4_transpose(math_matrix_4x4 *out, const math_matrix_4x4 *in);