diff --git a/src/org/mozilla/javascript/Parser.java b/src/org/mozilla/javascript/Parser.java
index 8c01726595..ab8559dea5 100644
--- a/src/org/mozilla/javascript/Parser.java
+++ b/src/org/mozilla/javascript/Parser.java
@@ -888,11 +888,13 @@ private FunctionNode function(int type, boolean isGenerator) throws IOException
             syntheticType = FunctionNode.FUNCTION_EXPRESSION;
         }
 
-        if (syntheticType != FunctionNode.FUNCTION_EXPRESSION
-                && name != null
-                && name.length() > 0) {
-            // Function statements define a symbol in the enclosing scope
-            defineSymbol(Token.FUNCTION, name.getIdentifier());
+        if (syntheticType != FunctionNode.FUNCTION_EXPRESSION) {
+            if (name != null && name.length() > 0) {
+                // Function statements define a symbol in the enclosing scope
+                defineSymbol(Token.FUNCTION, name.getIdentifier());
+            } else {
+                reportError("msg.fn.missing.name");
+            }
         }
 
         FunctionNode fnNode = new FunctionNode(functionSourceStart, name);
diff --git a/src/org/mozilla/javascript/resources/Messages.properties b/src/org/mozilla/javascript/resources/Messages.properties
index d1d161939e..feb45fa40d 100644
--- a/src/org/mozilla/javascript/resources/Messages.properties
+++ b/src/org/mozilla/javascript/resources/Messages.properties
@@ -283,6 +283,9 @@ msg.let.decl.not.in.block =\
 msg.bad.object.init =\
     SyntaxError: invalid object initializer
 
+msg.fn.missing.name =\
+    SyntaxError: function statements require a function name
+
 # NodeTransformer
 msg.dup.label =\
     duplicated label