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-rw-r--r--src/cc-compat.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/cc-compat.h b/src/cc-compat.h
index a5e4ce17e..37f1ea81e 100644
--- a/src/cc-compat.h
+++ b/src/cc-compat.h
@@ -54,8 +54,12 @@
#if defined (_MSC_VER)
typedef unsigned char bool;
-# define true 1
-# define false 0
+# ifndef true
+# define true 1
+# endif
+# ifndef false
+# define false 0
+# endif
#else
# include <stdbool.h>
#endif