diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8521e058d..840c59d11 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 #### Fixes
 
 * Your contribution here.
+* [#1863](https://github.com/ruby-grape/grape/pull/1863): Fix entity data type identification - [@fotos](https://github.com/fotos).
 
 ### 1.2.3 (2019/01/16)
 
diff --git a/lib/grape/dsl/inside_route.rb b/lib/grape/dsl/inside_route.rb
index b4672bb97..1638270fe 100644
--- a/lib/grape/dsl/inside_route.rb
+++ b/lib/grape/dsl/inside_route.rb
@@ -84,7 +84,7 @@ def should_be_empty_array?(declared_param, passed_children_params)
         end
 
         def declared_param_is_array?(declared_param)
-          route_options_params[declared_param.to_s] && route_options_params[declared_param.to_s][:type] == 'Array'
+          route_options_params[declared_param.to_s] && route_options_params[declared_param.to_s][:type] <= Array
         end
 
         def route_options_params
diff --git a/lib/grape/validations/params_scope.rb b/lib/grape/validations/params_scope.rb
index 05c0c8c0a..613fcdf4b 100644
--- a/lib/grape/validations/params_scope.rb
+++ b/lib/grape/validations/params_scope.rb
@@ -241,7 +241,7 @@ def validates(attrs, validations)
 
         coerce_type = infer_coercion(validations)
 
-        doc_attrs[:type] = coerce_type.to_s if coerce_type
+        doc_attrs[:type] = coerce_type if coerce_type
 
         desc = validations.delete(:desc) || validations.delete(:description)
         doc_attrs[:desc] = desc if desc
diff --git a/spec/grape/api_spec.rb b/spec/grape/api_spec.rb
index 6397dbfc4..c23d25935 100644
--- a/spec/grape/api_spec.rb
+++ b/spec/grape/api_spec.rb
@@ -2795,10 +2795,10 @@ def static
       subject.get 'method'
 
       expect(subject.routes.map(&:params)).to eq [{
-        'group1'         => { required: true, type: 'Array' },
+        'group1'         => { required: true, type: Array },
         'group1[param1]' => { required: false, desc: 'group1 param1 desc' },
         'group1[param2]' => { required: true, desc: 'group1 param2 desc' },
-        'group2'         => { required: true, type: 'Array' },
+        'group2'         => { required: true, type: Array },
         'group2[param1]' => { required: false, desc: 'group2 param1 desc' },
         'group2[param2]' => { required: true, desc: 'group2 param2 desc' }
       }]
@@ -2818,7 +2818,7 @@ def static
         { description: 'nesting',
           params: {
             'root_param' => { required: true, desc: 'root param' },
-            'nested' => { required: true, type: 'Array' },
+            'nested' => { required: true, type: Array },
             'nested[nested_param]' => { required: true, desc: 'nested param' }
           } }
       ]