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-rw-r--r--scumm/boxes.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/scumm/boxes.cpp b/scumm/boxes.cpp
index ffd85d9301..3b550fce6b 100644
--- a/scumm/boxes.cpp
+++ b/scumm/boxes.cpp
@@ -850,7 +850,7 @@ void Scumm::createBoxMatrix() {
byte itinerary = itineraryMatrix[64 * i + j];
if (itinerary != Actor::kInvalidBox) {
addToMatrix(j);
- while (j < num && itinerary == itineraryMatrix[64 * i + (j + 1)])
+ while (j < num - 1 && itinerary == itineraryMatrix[64 * i + (j + 1)])
j++;
addToMatrix(j);
addToMatrix(itinerary);