diff -pruN poppler-0.61.0-orig/utils/CMakeLists.txt poppler-0.61.0/utils/CMakeLists.txt
--- poppler-0.61.0-orig/utils/CMakeLists.txt	2017-11-03 11:25:02.000000000 +0100
+++ poppler-0.61.0/utils/CMakeLists.txt	2017-11-06 05:05:10.570226844 +0100
@@ -97,6 +97,7 @@ if (ENABLE_NSS3)
   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