diff --git a/macros/supporting/ghost_record_per_datatype.sql b/macros/supporting/ghost_record_per_datatype.sql
index 03698646..991b212b 100644
--- a/macros/supporting/ghost_record_per_datatype.sql
+++ b/macros/supporting/ghost_record_per_datatype.sql
@@ -553,8 +553,8 @@
 {%- set error_value__numeric = var('datavault4dbt.error_value__numeric', -2) -%}
 
 {%- set hash = datavault4dbt.hash_method() -%}
-{%- set hash_default_values =  datavault4dbt.hash_default_values(hash_function=hash) -%}
-{%- set unknown_value__HASHTYPE = hash_default_values['unknown_key'] -%}
+{%- set hash_default_values =  fromjson(datavault4dbt.hash_default_values(hash_function=hash)) -%}
+{%- set unknown_value__HASHTYPE = hash_default_values.get('unknown_key') -%}
 {%- set error_value__HASHTYPE = hash_default_values['error_key'] -%}
 
 {%- set datatype = datatype | string | upper | trim -%}
@@ -566,7 +566,7 @@
         {%- elif datatype in ['INT', 'SMALLINT', 'TINYINT', 'BIGINT', 'DOUBLE', 'FLOAT'] %} CAST('{{unknown_value__numeric}}' as {{ datatype}}) as {{ alias }}
         {%- elif datatype.upper().startswith('DECIMAL') %} CAST('{{unknown_value__numeric}}' as DECIMAL) as {{ alias }}
         {%- elif datatype == 'BOOLEAN' %} CAST('FALSE' as BOOLEAN) as {{ alias }}
-        {%- elif datatype == 'BINARY' %} CAST('{{ unknown_value__HASHTYPE }}') as {{ alias }}
+        {%- elif datatype == 'BINARY' %} CAST('{{ unknown_value__HASHTYPE }}' as BINARY) as {{ alias }}
         {%- else %} CAST(NULL as {{ datatype }}) as {{ alias }}
         {% endif %}
 {%- elif ghost_record_type == 'error' -%}
@@ -576,7 +576,7 @@
         {%- elif datatype in ['INT', 'SMALLINT', 'TINYINT', 'BIGINT', 'DOUBLE', 'FLOAT'] %} CAST('{{error_value__numeric}}' as {{ datatype}}) as {{ alias }}
         {%- elif datatype.upper().startswith('DECIMAL') %} CAST('{{error_value__numeric}}' as DECIMAL) as {{ alias }}
         {%- elif datatype == 'BOOLEAN' %} CAST('FALSE' as BOOLEAN) as {{ alias }}
-        {%- elif datatype == 'BINARY' %} CAST('{{ error_value__HASHTYPE }}') as {{ alias }}
+        {%- elif datatype == 'BINARY' %} CAST('{{ error_value__HASHTYPE }}' as BINARY) as {{ alias }}
         {%- else %} CAST(NULL as {{ datatype }}) as {{ alias }}
         {% endif %}
 {%- else -%}
@@ -636,4 +636,4 @@
     {%- endif %}
 {%- endif -%}
 
-{%- endmacro -%}
\ No newline at end of file
+{%- endmacro -%}