1 files changed, 4 insertions, 1 deletions
diff --git a/src/main/java/com/beust/jcommander/JCommander.java b/src/main/java/com/beust/jcommander/JCommander.java
index efde39e..4f2929e 100644
--- a/src/main/java/com/beust/jcommander/JCommander.java
+++ b/src/main/java/com/beust/jcommander/JCommander.java
@@ -1263,7 +1263,10 @@ public class JCommander {
       String optionName = names.length > 0 ? names[0] : "[Main class]";
       if (converterClass != null && converterClass.isEnum()) {
         try {
-          result = Enum.valueOf((Class<? extends Enum>) converterClass, value.toUpperCase());
+          result = Enum.valueOf((Class<? extends Enum>) converterClass, value);
+          if (result == null) {
+            result = Enum.valueOf((Class<? extends Enum>) converterClass, value.toUpperCase());
+          }
         } catch (Exception e) {
           throw new ParameterException("Invalid value for " + optionName + " parameter. Allowed values:" +
                                        EnumSet.allOf((Class<? extends Enum>) converterClass));