diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6ced6f1..f521dd0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -130,6 +130,7 @@ if(UNIX AND NOT APPLE)
         install(FILES space.nouspiro.tenmon.desktop DESTINATION "${CMAKE_INSTALL_DATADIR}/applications")
         install(FILES resources/space.nouspiro.tenmon.png DESTINATION "${CMAKE_INSTALL_DATADIR}/icons/hicolor/64x64/apps")
         install(FILES resources/space.nouspiro.tenmon_128.png DESTINATION "${CMAKE_INSTALL_DATADIR}/icons/hicolor/128x128/apps" RENAME space.nouspiro.tenmon.png)
+        install(FILES space.nouspiro.tenmon.xisf.xml DESTINATION "${CMAKE_INSTALL_DATADIR}/mime/packages")
     endif()
     install(FILES space.nouspiro.tenmon.metainfo.xml DESTINATION "${CMAKE_INSTALL_DATADIR}/metainfo")
 endif(UNIX AND NOT APPLE)
diff --git a/install.cmake b/install.cmake
index fb78fc9..3790378 100644
--- a/install.cmake
+++ b/install.cmake
@@ -1,5 +1,7 @@
 find_program(XDG-DESKTOP-MENU_EXECUTABLE xdg-desktop-menu)
 find_program(XDG-ICON-RESOURCE_EXECUTABLE xdg-icon-resource)
+find_program(XDG-MIME xdg-mime)
 execute_process(COMMAND ${XDG-DESKTOP-MENU_EXECUTABLE} install --novendor space.nouspiro.tenmon.desktop WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR})
 execute_process(COMMAND ${XDG-ICON-RESOURCE_EXECUTABLE} install --novendor --size 64 resources/space.nouspiro.tenmon.png space.nouspiro.tenmon WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR})
 execute_process(COMMAND ${XDG-ICON-RESOURCE_EXECUTABLE} install --novendor --size 128 resources/space.nouspiro.tenmon_128.png space.nouspiro.tenmon WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR})
+execute_process(COMMAND ${XDG-MIME} install --novendor space.nouspiro.tenmon.xisf.xml WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR})
diff --git a/space.nouspiro.tenmon.xisf.xml b/space.nouspiro.tenmon.xisf.xml
new file mode 100644
index 0000000..31616e4
--- /dev/null
+++ b/space.nouspiro.tenmon.xisf.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
+   <mime-type type="image/x-xisf">
+      <comment>Extensible Image Serialization Format</comment>
+      <glob pattern="*.xisf"/>
+   </mime-type>
+</mime-info>