diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@
 set(KF5_MIN_VERSION "5.15.0")
 find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS Widgets Quick QuickWidgets Test)
 find_package(ECM 1.8.0 REQUIRED NO_MODULE)
-set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
 
 include(KDEInstallDirs)
 include(KDECMakeSettings)
@@ -69,6 +69,14 @@
                        TYPE REQUIRED
                        PURPOSE "Required for building screenlocker")
 
+find_package(loginctl)
+set_package_properties(loginctl PROPERTIES
+    URL "https://www.freedesktop.org/software/systemd/man/loginctl.html"
+    DESCRIPTION "Send control commands to the login manager"
+    TYPE RUNTIME
+    PURPOSE "Needed for emergency unlock in case that the greeter is broken. In case your distribution does not provide loginctl please contact plasma-devel@kde.org to discuss alternatives."
+    )
+
 include(ConfigureChecks.cmake)
 
 configure_file(config-workspace.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-workspace.h)
diff --git a/cmake/Findloginctl.cmake b/cmake/Findloginctl.cmake
new file mode 100644
--- /dev/null
+++ b/cmake/Findloginctl.cmake
@@ -0,0 +1,34 @@
+#=============================================================================
+# Copyright 2016 Martin Gräßlin <mgraesslin@kde.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote products
+#    derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#=============================================================================
+find_program(loginctl_EXECUTABLE NAMES loginctl)
+find_package_handle_standard_args(loginctl
+    FOUND_VAR
+        loginctl_FOUND
+    REQUIRED_VARS
+        loginctl_EXECUTABLE
+)
+mark_as_advanced(loginctl_EXECUTABLE)