--- a/lib/replace/replace.h
+++ b/lib/replace/replace.h
@@ -162,10 +162,6 @@
 #include <bsd/unistd.h>
 #endif
 
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
 #ifdef HAVE_STRING_H
 #include <string.h>
 #endif