diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java
index ac4c8a01b19e..58e12fff7015 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java
@@ -515,6 +515,7 @@ public PowerShellClientCodegen() {
         typeMapping.put("long", "Int64");
         typeMapping.put("double", "Double");
         typeMapping.put("number", "Decimal");
+        typeMapping.put("decimal", "Decimal");
         typeMapping.put("object", "System.Collections.Hashtable");
         typeMapping.put("file", "System.IO.FileInfo");
         typeMapping.put("ByteArray", "System.Byte[]");