diff --git a/lib/libm/common_source/exp.3 b/lib/libm/common_source/exp.3
index ae54b7ffaeb..842b72c5442 100644
--- a/lib/libm/common_source/exp.3
+++ b/lib/libm/common_source/exp.3
@@ -150,8 +150,9 @@ and
 .Fn pow
 detect if the computed value will overflow,
 set the global variable
-.Va errno to
-.Er RANGE
+.Va errno
+to
+.Er ERANGE
 and cause a reserved operand fault on a
 .Tn VAX
 or