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-rw-r--r--misc-utils/kill.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/misc-utils/kill.c b/misc-utils/kill.c
index 4d993e4d69..46c2f66a1b 100644
--- a/misc-utils/kill.c
+++ b/misc-utils/kill.c
@@ -46,7 +46,7 @@
#include <stdlib.h>
#include <string.h>
#include <strings.h>
-#include <ctype.h>
+#include <ctype.h> /* for isdigit() */
#include <unistd.h>
#include <signal.h>
#include "kill.h"