diff --git a/compat.h b/compat.h
index 8666a1d8..7d9b14fd 100644
--- a/compat.h
+++ b/compat.h
@@ -255,13 +255,18 @@ int		 unsetenv(const char *);
 
 #ifndef HAVE_CFMAKERAW
 /* cfmakeraw.c */
-void		cfmakeraw(struct termios *);
+void		 cfmakeraw(struct termios *);
 #endif
 
 #ifndef HAVE_OPENAT
 /* openat.c */
 #define AT_FDCWD -100
-int		openat(int, const char *, int, ...);
+int		 openat(int, const char *, int, ...);
+#endif
+
+#ifndef HAVE_REALLOCARRAY
+/* reallocarray.c */
+void		*reallocarray(void *, size_t, size_t size);
 #endif
 
 #ifdef HAVE_GETOPT