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-rw-r--r--resolv/inet_pton.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/resolv/inet_pton.c b/resolv/inet_pton.c
index d9e1f1dfcd..e1419b96b4 100644
--- a/resolv/inet_pton.c
+++ b/resolv/inet_pton.c
@@ -24,6 +24,7 @@ static char rcsid[] = "$Id$";
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <arpa/nameser.h>
+#include <ctype.h>
 #include <string.h>
 #include <errno.h>
 #include <conf/portability.h>