diff --git a/program/src/rrd_diff.c b/program/src/rrd_diff.c
index 093a293841d8923b56a289129c41e10a6a8ea131..2b5cb6678a60429be0628b8505bc531a8c43fb5b 100644 (file)
--- a/program/src/rrd_diff.c
+++ b/program/src/rrd_diff.c
*
*****************************************************************************/
+#include <ctype.h>
#include "rrd_tool.h"
double rrd_diff(