--- java/org/apache/jasper/compiler/JDTCompiler.java.orig	2025-02-04 19:19:35.610448198 +0100
+++ java/org/apache/jasper/compiler/JDTCompiler.java	2025-02-04 19:22:46.320745556 +0100
@@ -314,9 +314,9 @@ public class JDTCompiler extends org.apa
             } else if(opt.equals("17")) {
                 settings.put(CompilerOptions.OPTION_Source, CompilerOptions.VERSION_17);
             } else if(opt.equals("18")) {
-                settings.put(CompilerOptions.OPTION_Source, CompilerOptions.VERSION_18);
+                settings.put(CompilerOptions.OPTION_Source, "18");
             } else if (opt.equals("19")) {
-                settings.put(CompilerOptions.OPTION_Source, CompilerOptions.VERSION_19);
+                settings.put(CompilerOptions.OPTION_Source, "19");
             } else if (opt.equals("20")) {
                 // Constant not available in latest ECJ version shipped with
                 // Tomcat. May be supported in a snapshot build.
@@ -389,11 +389,11 @@ public class JDTCompiler extends org.apa
                 settings.put(CompilerOptions.OPTION_TargetPlatform, CompilerOptions.VERSION_17);
                 settings.put(CompilerOptions.OPTION_Compliance, CompilerOptions.VERSION_17);
             } else if(opt.equals("18")) {
-                settings.put(CompilerOptions.OPTION_TargetPlatform, CompilerOptions.VERSION_18);
-                settings.put(CompilerOptions.OPTION_Compliance, CompilerOptions.VERSION_18);
+                settings.put(CompilerOptions.OPTION_TargetPlatform, "18");
+                settings.put(CompilerOptions.OPTION_Compliance, "18");
             } else if (opt.equals("19")) {
-                settings.put(CompilerOptions.OPTION_TargetPlatform, CompilerOptions.VERSION_19);
-                settings.put(CompilerOptions.OPTION_Compliance, CompilerOptions.VERSION_19);
+                settings.put(CompilerOptions.OPTION_TargetPlatform, "19");
+                settings.put(CompilerOptions.OPTION_Compliance, "19");
             } else if (opt.equals("20")) {
                 // Constant not available in latest ECJ version shipped with
                 // Tomcat. May be supported in a snapshot build.