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-rw-r--r--man3/exp2.32
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diff --git a/man3/exp2.3 b/man3/exp2.3
index d0a40bec..376d4096 100644
--- a/man3/exp2.3
+++ b/man3/exp2.3
@@ -43,7 +43,7 @@ exp2, exp2f, exp2l \- base-2 exponential function
.BI "long double exp2l(long double " x );
.fi
.sp
-Link with \-lm.
+Compile with -std=c99; link with \-lm.
.SH DESCRIPTION
The \fBexp2()\fP function returns the value of 2
raised to the power of \fIx\fP.