diff --git a/include/math/mat.tpp b/include/math/mat.tpp
index c7a7342..40a4eaf 100644
--- a/include/math/mat.tpp
+++ b/include/math/mat.tpp
@@ -281,10 +281,10 @@ namespace math{
 		using res_t = decltype(std::declval<T>() * std::declval<U>());
 		matrix<res_t,R1,C2> res(zero_initialize);
 		size_t index = 0;
-		for(size_t i = 0; i < left.rows(); ++i){
-			for(size_t j = 0; j < right.columns(); ++j){
-				for(size_t k = 0; k < right.rows(); ++k){
-					res.get(index) += left[i][k] * right[k][j];
+		for(size_t i = 0; i < right.rows(); ++i){
+			for(size_t j = 0; j < left.columns(); ++j){
+				for(size_t k = 0; k < left.rows(); ++k){
+					res.get(index) += right.get(i, k) * left.get(k, j);
 				}
 				++index;
 			}