diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index 04d08c95..4e6ce31b 100755
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -112,7 +112,13 @@ if(BUILD_tools AND NOT WINCE)
     target_link_libraries(xmlwf expat)
     install(TARGETS xmlwf DESTINATION bin)
     if(BUILD_doc)
-        add_custom_command(TARGET expat PRE_BUILD COMMAND $(MAKE) -C "${PROJECT_SOURCE_DIR}/doc" xmlwf.1)
+        if(CMAKE_GENERATOR STREQUAL "Unix Makefiles")
+            set(make_command "$(MAKE)")
+        else()
+            set(make_command "make")
+        endif()
+
+        add_custom_command(TARGET expat PRE_BUILD COMMAND "${make_command}" -C "${PROJECT_SOURCE_DIR}/doc" xmlwf.1)
         install(FILES "${PROJECT_SOURCE_DIR}/doc/xmlwf.1" DESTINATION share/man/man1)
     endif()
 endif(BUILD_tools AND NOT WINCE)