diff --git a/qad/doc/CMakeLists.txt b/qad/doc/CMakeLists.txt
index 5bd3a86..893b649 100644
--- a/qad/doc/CMakeLists.txt
+++ b/qad/doc/CMakeLists.txt
@@ -1,17 +1,20 @@
 include(CheckIncludeFileCXX)
-set(CHECK_INCLUDES "-include stdio.h")
-if(WIN32)
-	set(CHECK_INCLUDES "-include windows.h -include stdio.h")
-endif()
-check_include_file_cxx("mkdio.h" MARKDOWN_HEADER_MKDIO ${CHECK_INCLUDES})
-if (MARKDOWN_HEADER_MKDIO)
-	add_definitions("-DMARKDOWN_HEADER=\"mkdio.h\"")
-endif()
-check_include_file_cxx("markdown/markdown.h" MARKDOWN_HEADER_MARKDOWN ${CHECK_INCLUDES})
-if (MARKDOWN_HEADER_MARKDOWN)
-	add_definitions("-DMARKDOWN_HEADER=\"markdown/markdown.h\"")
-endif()
 find_library(MARKDOWN_LIBRARY markdown)
+set(_LIBS)
 if (MARKDOWN_LIBRARY)
-	qad_project(doc "Core" "${MARKDOWN_LIBRARY}")
+	list(APPEND _LIBS "${MARKDOWN_LIBRARY}")
+	add_definitions("-DUSE_MARKDOWN")
+	set(CHECK_INCLUDES "-include stdio.h")
+	if(WIN32)
+		set(CHECK_INCLUDES "-include windows.h -include stdio.h")
+	endif()
+	check_include_file_cxx("mkdio.h" MARKDOWN_HEADER_MKDIO ${CHECK_INCLUDES})
+	if (MARKDOWN_HEADER_MKDIO)
+		add_definitions("-DMARKDOWN_HEADER=\"mkdio.h\"")
+	endif()
+	check_include_file_cxx("markdown/markdown.h" MARKDOWN_HEADER_MARKDOWN ${CHECK_INCLUDES})
+	if (MARKDOWN_HEADER_MARKDOWN)
+		add_definitions("-DMARKDOWN_HEADER=\"markdown/markdown.h\"")
+	endif()
 endif()
+qad_project(doc "Core" "${_LIBS}")
diff --git a/qad/doc/markdown.cpp b/qad/doc/markdown.cpp
index 957800c..f7f6974 100644
--- a/qad/doc/markdown.cpp
+++ b/qad/doc/markdown.cpp
@@ -1,30 +1,33 @@
 #include "markdown.h"
 #include <QDebug>
+#ifdef USE_MARKDOWN
 extern "C" {
-#include MARKDOWN_HEADER
+#  include MARKDOWN_HEADER
 }
-#ifndef mkd_flags_are
-#  ifndef MKD_DLEXTRA
-#    define MKD_DLEXTRA 0x01000000
-#  endif
-#  ifndef MKD_FENCEDCODE
-#    define MKD_FENCEDCODE 0x02000000
+#  ifndef mkd_flags_are
+#    ifndef MKD_DLEXTRA
+#      define MKD_DLEXTRA 0x01000000
+#    endif
+#    ifndef MKD_FENCEDCODE
+#      define MKD_FENCEDCODE 0x02000000
+#    endif
 #  endif
 #endif
 
 
 QString md2html(const QByteArray & src) {
+#ifdef USE_MARKDOWN
 	static bool _is_mkd_init = false;
 	if (src.isEmpty()) return QString();
 	if (!_is_mkd_init) {
 		_is_mkd_init = true;
 		mkd_initialize();
 	}
-#ifdef _MARKDOWN_D
+#  ifdef _MARKDOWN_D
 	DWORD flagm = (MKD_DLEXTRA | MKD_FENCEDCODE);
 	Document
-#endif
-#ifdef _MKDIO_D
+#  endif
+#  ifdef _MKDIO_D
 		#ifdef mkd_flags_are
 			mkd_flag_t * flagm = mkd_flags();
 			mkd_set_flag_num(flagm, MKD_DLEXTRA);
@@ -33,7 +36,7 @@ QString md2html(const QByteArray & src) {
 			mkd_flag_t flagm = (MKD_DLEXTRA | MKD_FENCEDCODE);
 		#endif
 	MMIOT
-#endif
+#  endif
 			* doc = mkd_string(src.constData(), src.size(), 0);
 	if (!doc) return QString();
 	mkd_compile(doc, flagm);
@@ -57,5 +60,8 @@ QString md2html(const QByteArray & src) {
 	ret.prepend(header);
 	ret.append("</body>\n</html>\n");
 	return ret;
+#else
+	return QString();
+#endif
 }