1 files changed, 3 insertions, 0 deletions
diff --git a/src/main/java/com/beust/jcommander/JCommander.java b/src/main/java/com/beust/jcommander/JCommander.java
index 99846f7..8fd455d 100644
--- a/src/main/java/com/beust/jcommander/JCommander.java
+++ b/src/main/java/com/beust/jcommander/JCommander.java
@@ -845,6 +845,9 @@ public class JCommander {
                         || boolean.class.isAssignableFrom(fieldType))) {
             pd.addValue("true");
             requiredFields.remove(pd.getParameterized());
+        } else if (arity == 0) {
+            throw new ParameterException("Expected a value after parameter " + arg);
+
         } else if (index < args.length - 1) {
             int offset = "--".equals(args[index + 1]) ? 1 : 0;