diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index f2184d09f3..e5526ef65e 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -2664,7 +2664,6 @@
                 A post-installation function has the following structure:
                 <literallayout class='monospaced'>
      pkg_postinst_PACKAGENAME() {
-     #!/bin/sh -e
      # Commands to carry out
      }
                 </literallayout>
@@ -2687,7 +2686,6 @@
                 structure in the post-installation script:
                 <literallayout class='monospaced'>
      pkg_postinst_PACKAGENAME() {
-     #!/bin/sh -e
      if [ x"$D" = "x" ]; then
           # Actions to carry out on the device go here
      else