diff --git a/misc/archive/genprifixdiff.sh b/misc/archive/genprifixdiff.sh
new file mode 100644
index 000000000..d1609ddb7
--- /dev/null
+++ b/misc/archive/genprifixdiff.sh
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# Usage example:
+# for x in [0-9]*.patch; do bash genprifixdiff.sh ${x%.patch}; done
+
+if [ -f fixdiff_$1.patch ]; then
+	echo "Found existing fixdiff for $1!"
+	exit 1
+fi
+
+cp $1.patch $1.patch_new
+
+for descfile in $( lsdiff $1.patch | grep '\.desc$'; )
+do
+	currpri=$( grep '^\[P\]' $descfile | sed 's, *$,,; s,.* ,,'; )
+	if [ -n "$currpri" ]; then
+		perl -i -pe "
+			if (not \$done) {
+				\$gotit = 1 if m,$descfile,;
+				\$done = 1 if \$gotit and s/(\[P\].*)([0-9]{3}\.[0-9]{3})/\${1}$currpri/;
+			}
+		" $1.patch_new
+	fi
+done
+
+{
+	echo "Generated using genprifixdiff.sh"
+	diff -u $1.patch $1.patch_new
+} > fixdiff_$1.patch
+
+rm -f $1.patch_new
+
+exit 0
+