diff --git a/lib/krb5/checksum.c b/lib/krb5/checksum.c
index 5912a95f8..21a64bc70 100644
--- a/lib/krb5/checksum.c
+++ b/lib/krb5/checksum.c
@@ -1,4 +1,5 @@
 #include <krb5_locl.h>
+#include <crc.h>
 
 RCSID("$Id$");