pdfsig: install man page
diff --git a/utils/CMakeLists.txt b/utils/CMakeLists.txt
index 07d7365..422de4c 100644
--- a/utils/CMakeLists.txt
+++ b/utils/CMakeLists.txt
@@ -97,6 +97,7 @@
   add_executable(pdfsig ${pdfsig_SOURCES})
   target_link_libraries(pdfsig ${common_libs})
   install(TARGETS pdfsig DESTINATION bin)
+  install(FILES pdfsig.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
 endif ()
 
 # pdftops