diff --git a/CMakeLists.txt b/CMakeLists.txt
index cd98971..5118fd4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,6 +60,29 @@ SET_TARGET_PROPERTIES(fwknop-gui PROPERTIES POSITION_INDEPENDENT_CODE ON)
 
 target_link_libraries(fwknop-gui ${wxWidgets_LIBRARIES} ${LIBFKO_LIBRARIES} ${CURL_LIBRARIES} ${LIBQRENCODE_LIBRARIES} ${GPGME_VANILLA_LIBRARIES})
 if(IS_LINUX)
+find_program(A2X_EXECUTABLE NAMES a2x a2x.py)
+set(A2X_OPTS
+  -D ${CMAKE_BINARY_DIR}
+  -d manpage
+  -f manpage
+  )
+
+set(MAN_NAMES fwknop-gui.8)
+set(MAN_FILES)
+foreach(m IN LISTS MAN_NAMES)
+  set(mf ${CMAKE_BINARY_DIR}/${m})
+  set(ms ${CMAKE_SOURCE_DIR}/${m}.asciidoc)
+  add_custom_command(OUTPUT ${mf}
+    COMMAND ${A2X_EXECUTABLE} ${A2X_OPTS} ${ms}
+    DEPENDS ${ms}
+    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+    COMMENT "Building manpage ${mf}"
+    VERBATIM)
+  list(APPEND MAN_FILES ${mf})
+endforeach()
+
+add_custom_target(man ALL DEPENDS ${MAN_FILES})
+
   install(FILES help.html DESTINATION share/fwknop-gui)
   install(TARGETS fwknop-gui DESTINATION bin)
   install(PROGRAMS fwknop-gui.desktop DESTINATION share/applications)
diff --git a/fwknop-gui.8.asciidoc b/fwknop-gui.8.asciidoc
new file mode 100644
index 0000000..1bf7bd4
--- /dev/null
+++ b/fwknop-gui.8.asciidoc
@@ -0,0 +1,36 @@
+:man source: Fwknop-gui Client
+:man manual: Fwknop-gui Client
+
+FWKNOP-GUI(8)
+=============
+
+NAME
+----
+fwknop-gui - Firewall Knock Operator Graphical User Interface
+
+
+SYNOPSIS
+--------
+*fwknop-gui*
+
+DESCRIPTION
+-----------
+*fwknop-gui* provides a graphical interface to send SPA packets.
+
+Supports AES and GPG encrypted SPA packets.
+
+BUGS
+----
+To report a bug, please visit https://github.com/jp-bennett/fwknop-gui
+
+SEE ALSO
+--------
+fwknop(8), fwknopd(8)
+
+More information on Single Packet Authorization can be found in the paper
+``Single Packet Authorization with fwknop'' available at
+'http://www.cipherdyne.org/fwknop/docs/SPA.html'.
+
+AUTHORS
+-------
+The primary developer of *fwknop-gui* is Jonathan Bennett <jbennett@incomsystems.biz>.