bihx: fix warning

diff --git a/Kernel/tools/bihx.c b/Kernel/tools/bihx.c
index 6532803..031a8ae 100644 (file)
--- a/Kernel/tools/bihx.c
+++ b/Kernel/tools/bihx.c
@@ -10,6 +10,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <ctype.h>
 
 FILE *fseg[10];
 static char fbuf[64];