diff -up OpenCPN-5.0.0/CMakeLists.txt.orig OpenCPN-5.0.0/CMakeLists.txt
--- OpenCPN-5.0.0/CMakeLists.txt.orig	2019-04-03 13:49:21.423885285 -0500
+++ OpenCPN-5.0.0/CMakeLists.txt	2019-04-03 13:51:19.789880135 -0500
@@ -91,6 +91,7 @@ SET(CMAKE_MODULE_PATH
   ${CMAKE_SOURCE_DIR}/cmake
 )
 
+SET(MAN_PATH "man/man1")
 
 set (CMAKE_CXX_STANDARD 11)
 message(STATUS "Setting C++11 standard via cmake standard mechanism")
@@ -2422,7 +2423,7 @@ IF(NOT APPLE)
     INSTALL(FILES src/bitmaps/other_svg_src/opencpn.svg DESTINATION ${PREFIX_DATA}/icons/hicolor/scalable/apps PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
     INSTALL(FILES data/opencpn.desktop DESTINATION ${PREFIX_DATA}/applications PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ )
     INSTALL(FILES data/opencpn.appdata.xml DESTINATION ${PREFIX_DATA}/appdata PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ )
-    INSTALL(FILES opencpn.1 DESTINATION ${PREFIX_DATA}/man/man1 PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ )
+    INSTALL(FILES opencpn.1 DESTINATION ${MAN_PATH} PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ )
   ENDIF(UNIX)
 
 ENDIF(NOT APPLE)