Include "error.h" instead of simply declaring `void error ();'.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/sum.c b/src/sum.c
index 6c68c0b1a..2a77eef27 100644
--- a/src/sum.c
+++ b/src/sum.c
@@ -26,11 +26,11 @@
 #include <getopt.h>
 #include "system.h"
 #include "version.h"
+#include "error.h"
 
 static int bsd_sum_file ();
 static int sysv_sum_file ();
 
-void error ();
 int safe_read ();
 
 /* The name this program was run with. */