diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 25c571f..8eabd04 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -30,7 +30,9 @@ endmacro()
 # build and install man pages (if asciidoc is available)
 find_program(A2X a2x)
 if(A2X)
-    add_man_page(csexec)
+    if(TARGET csexec)
+        add_man_page(csexec)
+    endif()
     add_man_page(cswrap)
     add_custom_target(doc ALL DEPENDS ${man_pages})
 endif()