diff --git a/macOS/build.sh b/macOS/build.sh
index d4680da7249201c2405c4b0df8fa7a547c942b01..845be1085375fa5ce4bb08e3ef8104d86b86b8ea 100755
--- a/macOS/build.sh
+++ b/macOS/build.sh
@@ -38,7 +38,7 @@ else
     path_remove PATH /opt/homebrew/bin
     MATLAB_ARCH=maci64
     # On x86_64 we need to differentiate between older and newer MATLAB versions
-    OLD_MATLAB_PATH=/Applications/MATLAB_R2016b.app
+    OLD_MATLAB_PATH=/Applications/"$PKG_ARCH"/MATLAB_R2016b.app
 fi
 MATLAB_PATH=/Applications/"$PKG_ARCH"/MATLAB_R2023b.app