diff --git a/common/changetech.sh b/common/changetech.sh
new file mode 100755
index 0000000..383aac6
--- /dev/null
+++ b/common/changetech.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+#
+# Example file converts the techname in all magic database files.
+
+for i in `ls *.mag` ; do
+    /ef/efabless/bin/preproc.py -DEFXH035A=EFXH035B $i > tmp.out
+    mv tmp.out $i ;
+done
+