1 files changed, 1 insertions, 0 deletions

diff --git a/which.c b/which.c
index b43c994..798d7b0 100644
--- a/which.c
+++ b/which.c
@@ -10,6 +10,7 @@
 
 #include "rc.h"
 
+#include <ctype.h>
 #include <errno.h>
 #include <sys/stat.h>