diff --git a/doc/zzuf.1 b/doc/zzuf.1
index e807156..5229043 100644
--- a/doc/zzuf.1
+++ b/doc/zzuf.1
@@ -285,11 +285,11 @@ using functions that are not in that list, \fBzzuf\fR will not fuzz its
 input consistently and the results should not be trusted. You can use a tool
 such as \fBltrace(1)\fR on Linux to know the missing functions.
 .PP
-On some systems, such as FreeBSD, \fB__srefill\fR() is enough to monitor all
-standard IO streams functions. On other systems each function needs to be
-reimplemented on a case by case basis. One important unimplemented function
-is \fBfscanf\fR(), because of its complexity. Missing functions will be
-implemented based upon user request.
+On BSD systems, such as FreeBSD or Mac OS X, \fB__srefill\fR() is enough to
+monitor all standard IO streams functions. On other systems, such as Linux,
+each function is reimplemented on a case by case basis. One important
+unimplemented function is \fBfscanf\fR(), because of its complexity. Missing
+functions will be added upon user request.
 .SH HISTORY
 .PP
 \fBZzuf\fR started its life in 2002 as the \fBstreamfucker\fR tool, a small
diff --git a/src/load-stream.c b/src/load-stream.c
index 2660c04..5fe2785 100644
--- a/src/load-stream.c
+++ b/src/load-stream.c
@@ -41,10 +41,6 @@
 #include "load.h"
 #include "fd.h"
 
-#if !defined __FreeBSD__ && !defined __OpenBSD__
-#   undef HAVE___SREFILL
-#endif
-
 #ifdef HAVE___SREFILL
 int __srefill(FILE *fp);
 #endif