diff --git a/modules/openapi-generator/src/main/resources/powershell/api.mustache b/modules/openapi-generator/src/main/resources/powershell/api.mustache
index c13395de842..d648594aeb4 100644
--- a/modules/openapi-generator/src/main/resources/powershell/api.mustache
+++ b/modules/openapi-generator/src/main/resources/powershell/api.mustache
@@ -172,7 +172,12 @@ function {{{vendorExtensions.x-powershell-method-name}}} {
 
         {{/isNullable}}
         {{/required}}
+        {{#isArray}}
+        $LocalVarBodyParameter = ,${{{paramName}}} | ConvertTo-Json -Depth 100
+        {{/isArray}}
+        {{^isArray}}
         $LocalVarBodyParameter = ${{{paramName}}} | ConvertTo-Json -Depth 100
+        {{/isArray}}
 
         {{/bodyParam}}
         {{#authMethods}}
diff --git a/samples/client/petstore/powershell/src/PSPetstore/Api/PSUserApi.ps1 b/samples/client/petstore/powershell/src/PSPetstore/Api/PSUserApi.ps1
index 6d3be8f1037..d1a485d31e2 100644
--- a/samples/client/petstore/powershell/src/PSPetstore/Api/PSUserApi.ps1
+++ b/samples/client/petstore/powershell/src/PSPetstore/Api/PSUserApi.ps1
@@ -133,7 +133,7 @@ function New-PSUsersWithArrayInput {
             throw "Error! The required parameter `User` missing when calling createUsersWithArrayInput."
         }
 
-        $LocalVarBodyParameter = $User | ConvertTo-Json -Depth 100
+        $LocalVarBodyParameter = ,$User | ConvertTo-Json -Depth 100
 
         $LocalVarResult = Invoke-PSApiClient -Method 'POST' `
                                 -Uri $LocalVarUri `
@@ -208,7 +208,7 @@ function New-PSUsersWithListInput {
             throw "Error! The required parameter `User` missing when calling createUsersWithListInput."
         }
 
-        $LocalVarBodyParameter = $User | ConvertTo-Json -Depth 100
+        $LocalVarBodyParameter = ,$User | ConvertTo-Json -Depth 100
 
         $LocalVarResult = Invoke-PSApiClient -Method 'POST' `
                                 -Uri $LocalVarUri `