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 7f2801a7be3..850b3205f26 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
@@ -48,7 +48,9 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
         importMapping.clear();
 
         supportsInheritance = true;
-        setReservedWordsLowerCase(Arrays.asList(
+        
+        // NOTE: TypeScript uses camel cased reserved words, while models are title cased. We don't want lowercase comparisons.
+        reservedWords.addAll(Arrays.asList(
                 // local variable names used in API methods (endpoints)
                 "varLocalPath", "queryParameters", "headerParams", "formParams", "useFormData", "varLocalDeferred",
                 "requestOptions",
@@ -344,6 +346,12 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
         }
 
     }
+    
+    @Override
+    protected boolean isReservedWord(String word) {
+        // NOTE: This differs from super's implementation in that TypeScript does _not_ want case insensitive matching.
+        return reservedWords.contains(word);
+    }
 
     @Override
     public String getSchemaType(Schema p) {