diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractTypeScriptClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractTypeScriptClientCodegen.java
index 2518522913d..06c9a488a6a 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractTypeScriptClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractTypeScriptClientCodegen.java
@@ -508,9 +508,9 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
 
     @Override
     public String toParamName(String name) {
-        // obtain the name from nameMapping directly if provided
-        if (nameMapping.containsKey(name)) {
-            return nameMapping.get(name);
+        // obtain the name from parameterNameMapping directly if provided
+        if (parameterNameMapping.containsKey(name)) {
+            return parameterNameMapping.get(name);
         }
 
         name = sanitizeName(name, "[^\\w$]");