diff --git a/src/KKdLib/mat.cpp b/src/KKdLib/mat.cpp
index f67b2189..cf0790d1 100644
--- a/src/KKdLib/mat.cpp
+++ b/src/KKdLib/mat.cpp
@@ -2154,7 +2154,7 @@ inline void mat4_blend_rotation(const mat4* x, const mat4* y, mat4* z, float_t b
     quat q2;
 
     quat_from_mat3(x->row0.x, x->row1.x, x->row2.x, x->row0.y,
-        x->row1.y, x->row2.y, x->row0.z, x->row1.z, x->row2.z, &q1);
+        x->row1.y, x->row2.y, x->row0.z, x->row1.z, x->row2.z, &q0);
     quat_from_mat3(y->row0.x, y->row1.x, y->row2.x, y->row0.y,
         y->row1.y, y->row2.y, y->row0.z, y->row1.z, y->row2.z, &q1);
     q2 = quat::slerp(q0, q1, blend);