diff --git a/wpa_supplicant-2.9_standard/src/utils/common.h b/wpa_supplicant-2.9_standard/src/utils/common.h
index 53081fe38d19f74d092a5ab7a2a0035491bcf175..0057629f83685c80bef016bfb3c745fc3d6c6103 100644
--- a/wpa_supplicant-2.9_standard/src/utils/common.h
+++ b/wpa_supplicant-2.9_standard/src/utils/common.h
@@ -606,7 +606,9 @@ void int_array_sort_unique(int *a);
 void int_array_add_unique(int **res, int a);
 bool int_array_includes(int *arr, int val);
 
+#ifndef ARRAY_SIZE
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#endif
 
 void str_clear_free(char *str);
 void bin_clear_free(void *bin, size_t len);