diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ClojureClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ClojureClientCodegen.java
index 4a6762a3658..b97d62d7ca1 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ClojureClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ClojureClientCodegen.java
@@ -337,7 +337,7 @@ public class ClojureClientCodegen extends DefaultCodegen implements CodegenConfi
         List<CodegenOperation> ops = (List<CodegenOperation>) objs.get("operation");
         for (CodegenOperation op : ops) {
             // Convert httpMethod to lower case, e.g. "get", "post"
-            op.httpMethod = op.httpMethod.toLowerCase();
+            op.httpMethod = op.httpMethod.toLowerCase(Locale.ROOT);
 
             op.vendorExtensions.put(X_MODELS, models);
             op.httpMethod = op.httpMethod.toLowerCase(Locale.ROOT);