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-rw-r--r--math/bits/mathcalls.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h
index 3d1dc07d98..47808a2915 100644
--- a/math/bits/mathcalls.h
+++ b/math/bits/mathcalls.h
@@ -109,7 +109,7 @@ __MATHCALL (log10,, (_Mdouble_ __x));
 /* Break VALUE into integral and fractional parts.  */
 __MATHCALL (modf,, (_Mdouble_ __x, _Mdouble_ *__iptr)) __nonnull ((2));
 
-#if __GLIBC_USE (IEC_60559_FUNCS_EXT)
+#if __GLIBC_USE (IEC_60559_FUNCS_EXT_C2X)
 /* Compute exponent to base ten.  */
 __MATHCALL (exp10,, (_Mdouble_ __x));
 #endif