diff --git a/discover/CMakeLists.txt b/discover/CMakeLists.txt
--- a/discover/CMakeLists.txt
+++ b/discover/CMakeLists.txt
@@ -54,6 +54,9 @@
 if(RPM)
      set(DesktopMimeType "${DesktopMimeType}application/x-rpm;")
 endif()
+if(Flatpak_FOUND)
+  set(DesktopMimeType "${DesktopMimeType}application/vnd.flatpak;application/vnd.flatpak.repo;application/vnd.flatpak.ref;")
+endif()
 set(DesktopExec "plasma-discover %F")
 configure_file(org.kde.discover.desktop.cmake ${CMAKE_CURRENT_BINARY_DIR}/org.kde.discover.desktop)
 install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/org.kde.discover.desktop DESTINATION ${XDG_APPS_INSTALL_DIR} )