diff --git a/CMakeLists.txt b/CMakeLists.txt
index c8ea198202..9b1790d07d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -245,7 +245,9 @@ if(BUILD_CLIENT)
     if(NOT BUILD_LIBRARIES_ONLY)
         add_subdirectory(doc)
         add_subdirectory(doc/dev)
-        add_subdirectory(admin)
+        if(IS_DIRECTORY admin)
+            add_subdirectory(admin)
+        endif(IS_DIRECTORY admin)
     endif(NOT BUILD_LIBRARIES_ONLY)
 endif()