diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0b0e4fa..7fa70ac 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -250,6 +250,7 @@ if (WIN32)
 else (WIN32)
 	install (TARGETS logdiag DESTINATION bin)
 	install (FILES share/logdiag.desktop DESTINATION share/applications)
+	install (FILES share/logdiag.xml DESTINATION share/mime/packages)
 	install (DIRECTORY share/icons DESTINATION share)
 	install (DIRECTORY "${project_DOC_DIR}/html/"
 		DESTINATION share/gtk-doc/html/${CMAKE_PROJECT_NAME})
diff --git a/share/logdiag.desktop b/share/logdiag.desktop
index 485e0de..390676e 100644
--- a/share/logdiag.desktop
+++ b/share/logdiag.desktop
@@ -5,5 +5,5 @@ GenericName=Schematic Editor
 GenericName[cs]=Editor schémat
 Icon=logdiag
 Exec=logdiag %f
+MimeType=application/x-logdiag-diagram;
 Categories=Graphics;VectorGraphics;Electricity;Engineering;GTK;
-
diff --git a/share/logdiag.xml b/share/logdiag.xml
new file mode 100644
index 0000000..b8b9cab
--- /dev/null
+++ b/share/logdiag.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
+	<mime-type type="application/x-logdiag-diagram">
+		<comment>logdiag diagram</comment>
+		<comment xml:lang="cs">Diagram logdiag</comment>
+		<magic priority="50">
+			<match type="string" offset="0" value="/* logdiag diagram */"/>
+		</magic>
+		<glob pattern="*.ldd"/>
+	</mime-type>
+</mime-info>