diff --git a/scripts/install_addon b/scripts/install_addon
index 746d753b27..a7ec4b9d81 100755
--- a/scripts/install_addon
+++ b/scripts/install_addon
@@ -35,13 +35,13 @@ mkdir -p $ADDON_BUILD/$PKG_ADDON_ID
 
 if [ ! -f $ADDON_BUILD/$PKG_ADDON_ID/addon.xml ]; then
   cp config/addon/${PKG_ADDON_TYPE}.xml $ADDON_BUILD/$PKG_ADDON_ID/addon.xml
-  ADDONVER=$ADDON_VERSION.$PKG_REV
+  ADDONVER=${PKG_ADDON_VERSION:-${ADDON_VERSION}.${PKG_REV}}
 else
   if [ ! $(which xmlstarlet) ]; then
     echo "*** ERROR: $ADDON has addon.xml shipped, you need 'xmlstarlet' ***"
     exit 255
   fi
-  ADDONVER="$(xmlstarlet sel -t -v "/addon/@version" $ADDON_BUILD/$PKG_ADDON_ID/addon.xml).$PKG_REV"
+  ADDONVER="${PKG_ADDON_VERSION:-$(xmlstarlet sel -t -v "/addon/@version" $ADDON_BUILD/$PKG_ADDON_ID/addon.xml).$PKG_REV}"
   xmlstarlet ed --inplace -u "/addon[@version]/@version" -v "$ADDONVER" $ADDON_BUILD/$PKG_ADDON_ID/addon.xml
 fi
 
@@ -87,7 +87,7 @@ fi
 
 $SED -e "s|@PKG_ADDON_ID@|$PKG_ADDON_ID|g" \
      -e "s|@ADDON_NAME@|$ADDON_NAME|g" \
-     -e "s|@ADDON_VERSION@|$ADDON_VERSION.$PKG_REV|g" \
+     -e "s|@ADDON_VERSION@|$ADDONVER|g" \
      -e "s|@REQUIRES@|$REQUIRES|g" \
      -e "s|@PKG_SHORTDESC@|$PKG_SHORTDESC|g" \
      -e "s|@OS_VERSION@|$OS_VERSION|g" \