diff --git a/acc/preprocess.sh b/acc/preprocess.sh
index dad6b2b..7453070 100755
--- a/acc/preprocess.sh
+++ b/acc/preprocess.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
 # Preprocesses the give file using GCC. This script is usually automatically called in
 # ./compile.sh, but may be called also individually for debugging purposes.
-cat $1 | gcc ${@:2} -x c -E - | sed "s/#.*//g"
+cat $1 | gcc ${@:2} -x c -E - | sed "s/#.*//g" | tee ${PWD}/$(basename -- "$1").preprocessed