diff --git a/coreutils/cal.c b/coreutils/cal.c
index 7d39a77ad..d9456ed9e 100644
--- a/coreutils/cal.c
+++ b/coreutils/cal.c
@@ -31,7 +31,6 @@
 
 #include <sys/types.h>
 #include <ctype.h>
-#include <err.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>