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-rw-r--r--src/utilities.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/utilities.h b/src/utilities.h
index 5f79968..101ca64 100644
--- a/src/utilities.h
+++ b/src/utilities.h
@@ -39,7 +39,9 @@
#elif defined(__CYGWIN__) || defined(__CYGWIN32__)
# define OS_CYGWIN
#elif defined(linux) || defined(__linux) || defined(__linux__)
-# define OS_LINUX
+# ifndef OS_LINUX
+# define OS_LINUX
+# endif
#elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
# define OS_MACOSX
#elif defined(__FreeBSD__)