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-rw-r--r--math/math.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/math/math.h b/math/math.h
index 0a099596f1..1382baa75a 100644
--- a/math/math.h
+++ b/math/math.h
@@ -336,7 +336,7 @@ enum
# ifdef __SUPPORT_SNAN__
# define iszero(x) (fpclassify (x) == FP_ZERO)
# else
-# define iszero(x) ((x) == 0)
+# define iszero(x) (((__typeof (x)) (x)) == 0)
# endif
#endif /* Use IEC_60559_BFP_EXT. */