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-rw-r--r--math/bits/mathcalls.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h
index 0e9c855d64..6cb594b6ff 100644
--- a/math/bits/mathcalls.h
+++ b/math/bits/mathcalls.h
@@ -113,6 +113,12 @@ __MATHCALL (modf,, (_Mdouble_ __x, _Mdouble_ *__iptr)) __nonnull ((2));
 /* Compute exponent to base ten.  */
 __MATHCALL_VEC (exp10,, (_Mdouble_ __x));
 
+/* Return exp2(X) - 1.  */
+__MATHCALL (exp2m1,, (_Mdouble_ __x));
+
+/* Return exp10(X) - 1.  */
+__MATHCALL (exp10m1,, (_Mdouble_ __x));
+
 /* Return log2(1 + X).  */
 __MATHCALL (log2p1,, (_Mdouble_ __x));