diff --git a/Glob.cxx b/Glob.cxx
index b2209df93870450d3ef0e467e219c27d1f12a566..6fe21d1e2ed649fb35532bd29a467352fd0f46c8 100644
--- a/Glob.cxx
+++ b/Glob.cxx
@@ -39,7 +39,7 @@
 #include <string.h>
 namespace KWSYS_NAMESPACE
 {
-#if defined(_WIN32) || defined(APPLE) || defined(__CYGWIN__)
+#if defined(_WIN32) || defined(__APPLE__) || defined(__CYGWIN__)
 // On Windows and apple, no difference between lower and upper case
 # define KWSYS_GLOB_CASE_INDEPENDENT
 #endif