diff --git a/cmake/FindOGRE.cmake b/cmake/FindOGRE.cmake
index 4a7f0f3ccb..5608c528cd 100644
--- a/cmake/FindOGRE.cmake
+++ b/cmake/FindOGRE.cmake
@@ -237,7 +237,7 @@ if (OGRE_STATIC)
   find_package(OpenGLES2 QUIET)
   find_package(ZLIB QUIET)
   find_package(ZZip QUIET)
-  if (UNIX AND NOT APPLE OR NOT ANDROID)
+  if (UNIX AND (NOT APPLE AND NOT ANDROID))
     find_package(X11 QUIET)
     find_library(XAW_LIBRARY NAMES Xaw Xaw7 PATHS ${DEP_LIB_SEARCH_DIR} ${X11_LIB_SEARCH_PATH})
     if (NOT XAW_LIBRARY OR NOT X11_Xt_FOUND)