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-rw-r--r--libm/w_acosh.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libm/w_acosh.c b/libm/w_acosh.c
index a6e1a3594..ba1c327c9 100644
--- a/libm/w_acosh.c
+++ b/libm/w_acosh.c
@@ -24,7 +24,7 @@
double
acosh (double x)
{
-#if __UCLIBC_HAS_FENV__
+#if defined(__UCLIBC_HAS_FENV__)
if (__builtin_expect (isless (x, 1.0), 0) && _LIB_VERSION != _IEEE_)
/* acosh(x<1) */
return __kernel_standard (x, x, 29);