diff --git a/labs/memory_bound/loop_interchange_1/solution.cpp b/labs/memory_bound/loop_interchange_1/solution.cpp
index dabde87b..6d1d7981 100644
--- a/labs/memory_bound/loop_interchange_1/solution.cpp
+++ b/labs/memory_bound/loop_interchange_1/solution.cpp
@@ -27,8 +27,8 @@ void multiply(Matrix &result, const Matrix &a, const Matrix &b) {
   zero(result);
 
   for (int i = 0; i < N; i++) {
-    for (int j = 0; j < N; j++) {
-      for (int k = 0; k < N; k++) {
+    for (int k = 0; k < N; k++) {
+      for (int j = 0; j < N; j++) {
         result[i][j] += a[i][k] * b[k][j];
       }
     }