diff --git a/modules/swagger-parser-v3/src/main/java/io/swagger/v3/parser/util/ResolverFully.java b/modules/swagger-parser-v3/src/main/java/io/swagger/v3/parser/util/ResolverFully.java
index 4e35d5229f..c33ac684b7 100644
--- a/modules/swagger-parser-v3/src/main/java/io/swagger/v3/parser/util/ResolverFully.java
+++ b/modules/swagger-parser-v3/src/main/java/io/swagger/v3/parser/util/ResolverFully.java
@@ -395,18 +395,15 @@ public Schema resolveSchema(Schema schema) {
             for (String key : updated.keySet()) {
                 Schema property = updated.get(key);
 
-                if(property instanceof ObjectSchema) {
-                    ObjectSchema op = (ObjectSchema) property;
-                    if (op.getProperties() != model.getProperties()) {
-                        if (property.getType() == null) {
-                            property.setType("object");
-                        }
-                        model.addProperties(key, property);
-                    } else {
-                        LOGGER.debug("not adding recursive properties, using generic object");
-                        ObjectSchema newSchema = new ObjectSchema();
-                        model.addProperties(key, newSchema);
+                if (property.getProperties() != model.getProperties()) {
+                    if (property.getType() == null) {
+                        property.setType("object");
                     }
+                    model.addProperties(key, property);
+                } else {
+                    LOGGER.debug("not adding recursive properties, using generic object");
+                    ObjectSchema newSchema = new ObjectSchema();
+                    model.addProperties(key, newSchema);
                 }
 
             }
diff --git a/modules/swagger-parser/src/test/java/io/swagger/parser/OpenAPIParserTest.java b/modules/swagger-parser/src/test/java/io/swagger/parser/OpenAPIParserTest.java
index 7f14b57997..ad61cf0839 100644
--- a/modules/swagger-parser/src/test/java/io/swagger/parser/OpenAPIParserTest.java
+++ b/modules/swagger-parser/src/test/java/io/swagger/parser/OpenAPIParserTest.java
@@ -1,6 +1,7 @@
 package io.swagger.parser;
 
-import io.swagger.util.Yaml;
+import io.swagger.models.properties.Property;
+import io.swagger.v3.core.util.Yaml;
 import io.swagger.v3.oas.models.Components;
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.media.ArraySchema;
@@ -8,6 +9,7 @@
 import io.swagger.v3.oas.models.media.Schema;
 import io.swagger.v3.oas.models.PathItem;
 
+import io.swagger.v3.oas.models.media.StringSchema;
 import io.swagger.v3.oas.models.parameters.Parameter;
 import io.swagger.v3.oas.models.parameters.RequestBody;
 
@@ -561,6 +563,32 @@ public void testIssue1086() {
         Schema score = schema.getProperties().get("score");
         assertEquals(score.getMultipleOf().intValue(), 1);
     }
-  
+
+    @Test
+    public void testIssue1433_ResolveSchemaWithoutType() {
+        OpenAPIParser openApiParser = new OpenAPIParser();
+        ParseOptions options = new ParseOptions();
+        options.setResolveFully(true);
+
+        OpenAPI openAPI = openApiParser.readLocation("issue_1433-resolve-schema-without-type.yaml", null, options).getOpenAPI();
+        final Schema requestBodySchema = openAPI.getPaths().get("/foo").getPost().getRequestBody().getContent().get("application/json").getSchema();
+        assertNotNull(requestBodySchema);
+
+        final Map properties = requestBodySchema.getProperties();
+        assertEquals(2, properties.size());
+
+        final Object bar = properties.get("bar");
+        assertEquals(StringSchema.class, bar.getClass());
+
+        final Object input = properties.get("input");
+        assertEquals(Schema.class, input.getClass());
+
+        final Map inputProperties = ((Schema) input).getProperties();
+        assertNotNull(inputProperties);
+        assertEquals(1, inputProperties.size());
+
+        final Object baz = inputProperties.get("baz");
+        assertEquals(StringSchema.class, baz.getClass());
+    }
 }
 
diff --git a/modules/swagger-parser/src/test/resources/issue_1433-resolve-schema-without-type.yaml b/modules/swagger-parser/src/test/resources/issue_1433-resolve-schema-without-type.yaml
new file mode 100644
index 0000000000..436754ec39
--- /dev/null
+++ b/modules/swagger-parser/src/test/resources/issue_1433-resolve-schema-without-type.yaml
@@ -0,0 +1,28 @@
+openapi: 3.0.0
+info:
+  title: no type resolution
+  version: 1.0.0
+paths:
+  /foo:
+    post:
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/FooInput'
+      responses:
+        '200':
+          description: subscription successfully created
+components:
+  schemas:
+    FooInput:
+      properties:
+        bar:
+          type: string
+        input:
+          $ref: '#/components/schemas/BazInput'
+    BazInput:
+      properties:
+        baz:
+          type: string
\ No newline at end of file