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-rw-r--r--bits/fenv.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/bits/fenv.h b/bits/fenv.h
index c7ba575a87..d4870bf334 100644
--- a/bits/fenv.h
+++ b/bits/fenv.h
@@ -54,7 +54,7 @@ fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1l)
-#if __GLIBC_USE (IEC_60559_BFP_EXT)
+#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;