diff --git a/.changelog/bugfix-qualify-request-type-name-clash.json b/.changelog/bugfix-qualify-request-type-name-clash.json
new file mode 100644
index 00000000000..4b62af9a05f
--- /dev/null
+++ b/.changelog/bugfix-qualify-request-type-name-clash.json
@@ -0,0 +1,6 @@
+{
+  "type": "bugfix",
+  "category": "tools",
+  "contributor": "sbiscigl",
+  "description": "Qualify request types that clash with an operation name"
+}
diff --git a/tools/code-generation/generator/src/main/java/com/amazonaws/util/awsclientgenerator/domainmodels/codegeneration/cpp/CppViewHelper.java b/tools/code-generation/generator/src/main/java/com/amazonaws/util/awsclientgenerator/domainmodels/codegeneration/cpp/CppViewHelper.java
index 5ab08dd5e6c..55456ed1299 100644
--- a/tools/code-generation/generator/src/main/java/com/amazonaws/util/awsclientgenerator/domainmodels/codegeneration/cpp/CppViewHelper.java
+++ b/tools/code-generation/generator/src/main/java/com/amazonaws/util/awsclientgenerator/domainmodels/codegeneration/cpp/CppViewHelper.java
@@ -648,6 +648,11 @@ public static String checkForCollision(
                 .orElse(functionName);
     }
 
+    public static String getRequestTypeName(final ServiceModel serviceModel, final Operation operation) {
+        final String requestName = operation.getRequest().getShape().getName();
+        return serviceModel.getOperations().containsKey(requestName) ? "Model::" + requestName : requestName;
+    }
+
     public static boolean hasListMemberUsedForHeader(final Shape shape) {
         return shape.getMembers().values().stream()
                 .anyMatch(shapeMember -> shapeMember.getShape().isList() && shapeMember.isUsedForHeader());
diff --git a/tools/code-generation/generator/src/main/resources/com/amazonaws/util/awsclientgenerator/velocity/cpp/json/serviceoperations/withrequest/OperationOutcome.vm b/tools/code-generation/generator/src/main/resources/com/amazonaws/util/awsclientgenerator/velocity/cpp/json/serviceoperations/withrequest/OperationOutcome.vm
index 93c8b461662..cf02a5e206b 100644
--- a/tools/code-generation/generator/src/main/resources/com/amazonaws/util/awsclientgenerator/velocity/cpp/json/serviceoperations/withrequest/OperationOutcome.vm
+++ b/tools/code-generation/generator/src/main/resources/com/amazonaws/util/awsclientgenerator/velocity/cpp/json/serviceoperations/withrequest/OperationOutcome.vm
@@ -1,4 +1,4 @@
-${operation.name}Outcome ${className}::${operation.name}(${constText}${operation.request.shape.name}& request) const
+${operation.name}Outcome ${className}::${operation.name}(${constText}${CppViewHelper.getRequestTypeName($serviceModel, $operation)}& request) const
 {
 #if(!$operation.result.shape.hasEventStreamMembers() && !$operation.result.shape.hasStreamMembers())
       #parse("com/amazonaws/util/awsclientgenerator/velocity/cpp/common/ServiceInvokeOperationMethod.vm")