diff --git a/man/CMakeLists.txt b/man/CMakeLists.txt
index 8216fea33..3a6ff0e29 100644
--- a/man/CMakeLists.txt
+++ b/man/CMakeLists.txt
@@ -1,9 +1,22 @@
 # Build Docbook manual
 # Run 'make html' to build manual
 
-# Build manual in Linux - xmlto is not available in Windows
+# Build manual in Linux/Cygwin - xmlto is not available in Windows
+
+SET(DOC_TARGETS "html")
+
+# Build also htmlhelp in Cygwin - this can be used to build
+# htmlhelp manual for Windows.
+
+IF (CYGWIN)
+  SET(DOC_TARGETS
+    ${DOC_TARGETS}
+    "htmlhelp"
+  )
+ENDIF(CYGWIN)
+
 IF (UNIX OR CYGWIN)
   #macro XMLTO(outfiles infiles... MODES modes...)
   INCLUDE("../CMake/xmlto.cmake")
-  XMLTO("" "manual.docbook" MODES "html")
+  XMLTO("" "manual.docbook" MODES ${DOC_TARGETS})
 ENDIF (UNIX OR CYGWIN)