diff --git a/shared/nm-glib-aux/nm-shared-utils.c b/shared/nm-glib-aux/nm-shared-utils.c
index b46e0c486e..991ab6571f 100644
--- a/shared/nm-glib-aux/nm-shared-utils.c
+++ b/shared/nm-glib-aux/nm-shared-utils.c
@@ -19,6 +19,9 @@
 #include "nm-errno.h"
 #include "nm-str-buf.h"
 
+G_STATIC_ASSERT(sizeof(NMEtherAddr) == 6);
+G_STATIC_ASSERT(_nm_alignof(NMEtherAddr) == 1);
+
 G_STATIC_ASSERT(sizeof(NMUtilsNamedEntry) == sizeof(const char *));
 G_STATIC_ASSERT(G_STRUCT_OFFSET(NMUtilsNamedValue, value_ptr) == sizeof(const char *));