diff --git a/java/org/apache/jasper/compiler/JDTCompiler.java b/java/org/apache/jasper/compiler/JDTCompiler.java
index 4722a4a..27ce287 100644
--- a/java/org/apache/jasper/compiler/JDTCompiler.java
+++ b/java/org/apache/jasper/compiler/JDTCompiler.java
@@ -307,7 +307,7 @@ public class JDTCompiler extends org.apache.jasper.compiler.Compiler {
             } else if(opt.equals("13")) {
                 settings.put(CompilerOptions.OPTION_Source, CompilerOptions.VERSION_13);
             } else if(opt.equals("14")) {
-                settings.put(CompilerOptions.OPTION_Source, CompilerOptions.VERSION_14);
+                settings.put(CompilerOptions.OPTION_Source, "14");
             } else if(opt.equals("15")) {
                 // Constant not available in latest ECJ version shipped with
                 // Tomcat. May be supported in a snapshot build.
@@ -368,8 +368,8 @@ public class JDTCompiler extends org.apache.jasper.compiler.Compiler {
                 settings.put(CompilerOptions.OPTION_TargetPlatform, CompilerOptions.VERSION_13);
                 settings.put(CompilerOptions.OPTION_Compliance, CompilerOptions.VERSION_13);
             } else if(opt.equals("14")) {
-                settings.put(CompilerOptions.OPTION_TargetPlatform, CompilerOptions.VERSION_14);
-                settings.put(CompilerOptions.OPTION_Compliance, CompilerOptions.VERSION_14);
+                settings.put(CompilerOptions.OPTION_TargetPlatform, "14");
+                settings.put(CompilerOptions.OPTION_Compliance, "14");
             } else if(opt.equals("15")) {
                 // Constant not available in latest ECJ version shipped with
                 // Tomcat. May be supported in a snapshot build.