diff --git a/include/utils.h b/include/utils.h
index 588fceb7..01454f71 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -20,7 +20,6 @@
 
 extern int preferred_family;
 extern int human_readable;
-extern int use_iec;
 extern int show_stats;
 extern int show_details;
 extern int show_raw;
diff --git a/ip/ip_common.h b/ip/ip_common.h
index 227eddd3..9a31e837 100644
--- a/ip/ip_common.h
+++ b/ip/ip_common.h
@@ -6,6 +6,8 @@
 
 #include "json_print.h"
 
+extern int use_iec;
+
 struct link_filter {
 	int ifindex;
 	int family;
diff --git a/tc/tc_common.h b/tc/tc_common.h
index 802fb7f0..58dc9d6a 100644
--- a/tc/tc_common.h
+++ b/tc/tc_common.h
@@ -27,3 +27,4 @@ int check_size_table_opts(struct tc_sizespec *s);
 
 extern int show_graph;
 extern bool use_names;
+extern int use_iec;