diff --git a/lib/ansible/module_utils/aws/elbv2.py b/lib/ansible/module_utils/aws/elbv2.py
index 800267a0fe6..f7e7ecaf5e2 100644
--- a/lib/ansible/module_utils/aws/elbv2.py
+++ b/lib/ansible/module_utils/aws/elbv2.py
@@ -251,6 +251,8 @@ class ApplicationLoadBalancer(ElasticLoadBalancerV2):
         # Other parameters
         if self.subnets is not None:
             params['Subnets'] = self.subnets
+        if self.subnet_mappings is not None:
+            params['SubnetMappings'] = self.subnet_mappings
         if self.security_groups is not None:
             params['SecurityGroups'] = self.security_groups
         params['Scheme'] = self.scheme