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-rw-r--r--include/math.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/math.h b/include/math.h
index d4359f32..61738e6a 100644
--- a/include/math.h
+++ b/include/math.h
@@ -28,8 +28,8 @@ extern "C" {
 #define MATH_ERREXCEPT 2
 #define math_errhandling 2
 
-#define FP_ILOGBNAN (((unsigned)-1)>>1)
-#define FP_ILOGB0 (~FP_ILOGBNAN)
+#define FP_ILOGBNAN (-1-(int)(((unsigned)-1)>>1))
+#define FP_ILOGB0 FP_ILOGBNAN
 
 #define FP_NAN       0
 #define FP_INFINITE  1