diff --git a/usr.bin/elfctl/elfctl.c b/usr.bin/elfctl/elfctl.c
--- a/usr.bin/elfctl/elfctl.c
+++ b/usr.bin/elfctl/elfctl.c
@@ -41,6 +41,7 @@
 #include <getopt.h>
 #include <libelf.h>
 #include <stdbool.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -255,7 +256,7 @@
 				val = strtol(feature, &eptr, 0);
 				if (eptr == feature || *eptr != '\0')
 					errno = EINVAL;
-				else if (val > UINT_MAX)
+				else if ((unsigned long)val > UINT32_MAX)
 					errno = ERANGE;
 				if (errno != 0) {
 					warn("%s invalid", feature);