X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=src%2Frrd_diff.c;h=2b5cb6678a60429be0628b8505bc531a8c43fb5b;hp=093a293841d8923b56a289129c41e10a6a8ea131;hb=f0a82ae15cafb6ad47ea0c9f74754820e92e2078;hpb=219fd9224e3117dcf59df8818d4e9e3eab26022a

diff --git a/src/rrd_diff.c b/src/rrd_diff.c
index 093a293..2b5cb66 100644
--- a/src/rrd_diff.c
+++ b/src/rrd_diff.c
@@ -35,6 +35,7 @@
  *
  *****************************************************************************/
 
+#include <ctype.h>
 #include "rrd_tool.h"
 
 double rrd_diff(