diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,4 +84,8 @@
 
 install(FILES org.kde.step.appdata.xml DESTINATION ${KDE_INSTALL_METAINFODIR})
 
+find_package(SharedMimeInfo REQUIRED)
+install(FILES org.kde.step.xml DESTINATION ${XDG_MIME_INSTALL_DIR})
+update_xdg_mimetypes(${XDG_MIME_INSTALL_DIR})
+
 feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)
diff --git a/XmlMessages.sh b/XmlMessages.sh
new file mode 100755
--- /dev/null
+++ b/XmlMessages.sh
@@ -0,0 +1,22 @@
+function get_files
+{
+    echo org.kde.step.xml
+}
+
+function po_for_file
+{
+    case "$1" in
+       org.kde.step.xml)
+           echo step_xml_mimetypes.po
+       ;;
+    esac
+}
+
+function tags_for_file
+{
+    case "$1" in
+       org.kde.step.xml)
+           echo comment
+       ;;
+    esac
+}
diff --git a/org.kde.step.xml b/org.kde.step.xml
new file mode 100644
--- /dev/null
+++ b/org.kde.step.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-step">
+    <comment>Step Physical Simulator files</comment>
+    <icon name="step"/>
+    <magic priority="80">
+      <match offset="49" type="string" value="StepCoreXML" />
+    </magic>
+    <glob pattern="*.step"/>
+  </mime-type>
+</mime-info>
diff --git a/step/org.kde.step.desktop b/step/org.kde.step.desktop
--- a/step/org.kde.step.desktop
+++ b/step/org.kde.step.desktop
@@ -3,6 +3,7 @@
 Type=Application
 Exec=step -qwindowtitle %c -qwindowicon step
 Icon=step
+MimeType=application/x-step;
 X-DocPath=step/index.html
 Terminal=false
 Name=Step