diff --git a/OCRmyPDF.sh b/OCRmyPDF.sh
index 66d138ec..2f9a09e8 100644
--- a/OCRmyPDF.sh
+++ b/OCRmyPDF.sh
@@ -209,7 +209,7 @@ fi
 today=$(date +"%Y%m%d_%H%M")
 fld=$(basename "$FILE_INPUT_PDF" | sed 's/[.][^.]*$//')
 prefix="${today}.filename.${fld}"
-TMP_FLD=`TMPDIR=${TMP} mktemp -d -t "${prefix}"`			# create temporary sub-folder in $TMP folder
+TMP_FLD=`TMPDIR=${TMP} mktemp -d -t "${prefix}XXXXXXXX"`
 if [ $? -ne 0 ]; then
 	echo "Could not create folder for temporary files. Please ensure you have sufficient right and \"$TMP\" exists"
 	exit $EXIT_FILE_ACCESS_ERROR
@@ -232,7 +232,7 @@ sed '/^$/d' "$FILE_TMP" | awk '{printf "%04d %s\n", NR, $0}' > "$FILE_PAGES_INFO
 numpages=`tail -n 1 "$FILE_PAGES_INFO" | cut -f1 -d" "`
 
 # process each page of the input pdf file
-parallel -q -k --halt-on-error 1 "$OCR_PAGE" "$FILE_INPUT_PDF" "{}" "$numpages" "$TMP_FLD" \
+parallel --gnu -q -k --halt-on-error 1 "$OCR_PAGE" "$FILE_INPUT_PDF" "{}" "$numpages" "$TMP_FLD" \
 	"$VERBOSITY" "$LAN" "$KEEP_TMP" "$PREPROCESS_DESKEW" "$PREPROCESS_CLEAN" "$PREPROCESS_CLEANTOPDF" "$OVERSAMPLING_DPI" \
 	"$PDF_NOIMG" "$TESS_CFG_FILES" "$FORCE_OCR" < "$FILE_PAGES_INFO"
 ret_code="$?"
diff --git a/src/hocrTransform.py b/src/hocrTransform.py
old mode 100644
new mode 100755
diff --git a/src/ocrPage.sh b/src/ocrPage.sh
old mode 100644
new mode 100755