diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinClientCodegen.java
index 98afde69eb9..d4d4fecd182 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinClientCodegen.java
@@ -771,7 +771,7 @@ public class KotlinClientCodegen extends AbstractKotlinCodegen {
 
     private void processJvmSpringRestClientLibrary(final String infrastructureFolder) {
         if (additionalProperties.getOrDefault(USE_SPRING_BOOT3, false).equals(false)) {
-            throw new RuntimeException("This library muse use spring boot 3. Try adding '--additional-properties useSpringBoot3=true' to your command.");
+            throw new RuntimeException("This library must use Spring Boot 3. Try adding '--additional-properties useSpringBoot3=true' to your command.");
         }
 
         proccessJvmSpring(infrastructureFolder);