diff --git a/src/libecmaobjects/ecma-globals.h b/src/libecmaobjects/ecma-globals.h
index 3b6cf5e4e..7646eee17 100644
--- a/src/libecmaobjects/ecma-globals.h
+++ b/src/libecmaobjects/ecma-globals.h
@@ -457,7 +457,7 @@ typedef struct {
 /**
  * Size of a chunk, containing a String's part, in bytes
  */
-#define ECMA_ARRAY_CHUNK_SIZE_IN_BYTES  32
+#define ECMA_ARRAY_CHUNK_SIZE_IN_BYTES  8
 
 /**
  * Description of first chunk in a chain of chunks that contains an Array.
diff --git a/src/libecmaobjects/ecma-helpers.c b/src/libecmaobjects/ecma-helpers.c
index 65c5352ce..0721149c8 100644
--- a/src/libecmaobjects/ecma-helpers.c
+++ b/src/libecmaobjects/ecma-helpers.c
@@ -732,7 +732,7 @@ ecma_compare_zt_string_to_ecma_string(const ecma_char_t *string_p, /**< zero-ter
 
           JERRY_ASSERT( next_chunk_p != NULL );
 
-          current_chunk_chars_cur = (const ecma_char_t*) ecma_string_p->data;
+          current_chunk_chars_cur = (const ecma_char_t*) next_chunk_p->data;
           current_chunk_chars_end = (const ecma_char_t*) (next_chunk_p->data + sizeof(next_chunk_p->data));
 
           next_chunk_compressed_pointer_p = &next_chunk_p->next_chunk_p;