diff --git a/include/lib/util_base.h b/include/lib/util_base.h
index 0f4b12c5..e09abd87 100644
--- a/include/lib/util_base.h
+++ b/include/lib/util_base.h
@@ -14,7 +14,10 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+
 #include "zt_common.h"
+#include "lib/util_libc.h"
 
 void util_hexdump(FILE *fh, const char *tag, const void *data, int cnt);
 void util_hexdump_grp(FILE *fh, const char *tag, const void *data, int group,
@@ -37,4 +40,30 @@ static inline void util_ptr_vec_free(void **ptr_vec, int count)
 	free(ptr_vec);
 }
 
+/*
+ * Expand size of dynamic array (element_t *) by one element
+ *
+ * @param[in,out]  array  Pointer to array (element_t **)
+ * @param[in,out]  num    Pointer to integer containing number of elements
+ */
+#define util_expand_array(array, num) \
+	do { \
+		unsigned int __size = sizeof(*(*(array))); \
+		*(array) = util_realloc(*(array), ++(*(num)) * __size); \
+		memset(&((*(array))[*(num) - 1]), 0, __size); \
+	} while (0)
+
+/*
+ * Append one element to dynamic array (element_t *)
+ *
+ * @param[in,out]  array    Pointer to array (element_t **)
+ * @param[in,out]  num      Pointer to integer containing number of elements
+ * @param[in]      element  Element to add (element_t)
+ */
+#define util_add_array(array, num, element) \
+	do { \
+		util_expand_array(array, num); \
+		(*(array))[*(num) - 1] = (element) ; \
+	} while (0)
+
 #endif /* LIB_UTIL_BASE_H */