diff --git a/amf-api-contract/shared/src/main/scala/amf/apicontract/internal/spec/common/emitter/ParameterEmitters.scala b/amf-api-contract/shared/src/main/scala/amf/apicontract/internal/spec/common/emitter/ParameterEmitters.scala
index acbad4813c..24516ebe19 100644
--- a/amf-api-contract/shared/src/main/scala/amf/apicontract/internal/spec/common/emitter/ParameterEmitters.scala
+++ b/amf-api-contract/shared/src/main/scala/amf/apicontract/internal/spec/common/emitter/ParameterEmitters.scala
@@ -286,12 +286,8 @@ case class OasParametersEmitter(
   }
 
   def emitters(): Seq[EntryEmitter] = {
-    val results = ListBuffer[EntryEmitter]()
-    val (oasParameters, ramlParameters) =
-      parameters.partition(p =>
-        Option(p.schema).isEmpty || p.schema.isInstanceOf[ScalarShape] || p.schema
-          .isInstanceOf[ArrayShape] || p.schema.isInstanceOf[FileShape]
-      )
+    val results                         = ListBuffer[EntryEmitter]()
+    val (oasParameters, ramlParameters) = parameters.partition(isValidOasParam)
 
     if (oasParameters.nonEmpty || payloads.nonEmpty)
       results += OasParameterEmitter(oasParameters, references)
diff --git a/amf-cli/shared/src/test/resources/compatibility/oas30/nullable-query-param.json b/amf-cli/shared/src/test/resources/compatibility/oas30/nullable-query-param.json
new file mode 100644
index 0000000000..8dc6fa14ac
--- /dev/null
+++ b/amf-cli/shared/src/test/resources/compatibility/oas30/nullable-query-param.json
@@ -0,0 +1,28 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "title": "API",
+    "version": "1.0.0"
+  },
+  "paths": {
+    "/customers": {
+      "get": {
+        "parameters": [
+          {
+            "in": "query",
+            "name": "enterpriseCustomerNumber",
+            "schema": {
+              "nullable": true,
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/amf-cli/shared/src/test/resources/compatibility/oas30/nullable-query-param.yaml b/amf-cli/shared/src/test/resources/compatibility/oas30/nullable-query-param.yaml
new file mode 100644
index 0000000000..8c9b7bafa9
--- /dev/null
+++ b/amf-cli/shared/src/test/resources/compatibility/oas30/nullable-query-param.yaml
@@ -0,0 +1,17 @@
+openapi: 3.0.3
+info:
+  title: API
+  version: 1.0.0
+
+paths:
+  /customers:
+    get:
+      parameters:
+        - in: query
+          name: enterpriseCustomerNumber
+          schema:
+            nullable: true
+            type: string
+      responses:
+        '200':
+          description: OK
\ No newline at end of file
diff --git a/amf-cli/shared/src/test/resources/validations/oas3/nullable-query-param.yaml b/amf-cli/shared/src/test/resources/validations/oas3/nullable-query-param.yaml
new file mode 100644
index 0000000000..8c9b7bafa9
--- /dev/null
+++ b/amf-cli/shared/src/test/resources/validations/oas3/nullable-query-param.yaml
@@ -0,0 +1,17 @@
+openapi: 3.0.3
+info:
+  title: API
+  version: 1.0.0
+
+paths:
+  /customers:
+    get:
+      parameters:
+        - in: query
+          name: enterpriseCustomerNumber
+          schema:
+            nullable: true
+            type: string
+      responses:
+        '200':
+          description: OK
\ No newline at end of file
diff --git a/amf-cli/shared/src/test/scala/amf/emit/CompatibilityCycleTest.scala b/amf-cli/shared/src/test/scala/amf/emit/CompatibilityCycleTest.scala
index eb802afbb0..395f249e63 100644
--- a/amf-cli/shared/src/test/scala/amf/emit/CompatibilityCycleTest.scala
+++ b/amf-cli/shared/src/test/scala/amf/emit/CompatibilityCycleTest.scala
@@ -7,7 +7,7 @@ import amf.core.client.scala.errorhandling.UnhandledErrorHandler
 import amf.core.client.scala.model.document.BaseUnit
 import amf.core.client.scala.parse.AMFParser
 import amf.core.client.scala.transform.AMFTransformer
-import amf.core.internal.remote.{Hint, Oas30YamlHint, Raml10YamlHint}
+import amf.core.internal.remote.{Hint, Oas30JsonHint, Oas30YamlHint, Raml10YamlHint}
 import amf.core.internal.resource.StringResourceLoader
 import amf.io.FileAssertionTest
 import org.scalatest.Assertion
@@ -39,6 +39,15 @@ class CompatibilityCycleTest extends AsyncFunSuite with FileAssertionTest {
     )
   }
 
+  test("OAS 3.0 with nullable parameter to JSON") {
+    compatibility(
+      "oas30/nullable-query-param.yaml",
+      "oas30/nullable-query-param.json",
+      Oas30YamlHint,
+      Oas30JsonHint
+    )
+  }
+
   /** Compile source with specified hint. Render to temporary file and assert against golden. */
   private def compatibility(source: String, golden: String, from: Hint, to: Hint): Future[Assertion] = {
     for {