diff --git a/src/load-stream.c b/src/load-stream.c
index d69d347..627b750 100644
--- a/src/load-stream.c
+++ b/src/load-stream.c
@@ -36,6 +36,10 @@
 #include "fuzz.h"
 #include "load.h"
 
+#if !defined __FreeBSD__ && !defined __OpenBSD__
+#   undef HAVE___SREFILL
+#endif
+
 #ifdef HAVE___SREFILL
 int __srefill(FILE *fp);
 #endif