diff --git a/lib/antlr-2.7.5/antlr-2.7.5.jar b/lib/antlr-2.7.5/antlr-2.7.5.jar
index 8f859cb35..a80319914 100644
Binary files a/lib/antlr-2.7.5/antlr-2.7.5.jar and b/lib/antlr-2.7.5/antlr-2.7.5.jar differ
diff --git a/lib/antlr-2.7.5/antlr/CSharpCodeGenerator.java b/lib/antlr-2.7.5/antlr/CSharpCodeGenerator.java
index b58f38f45..2674050aa 100755
--- a/lib/antlr-2.7.5/antlr/CSharpCodeGenerator.java
+++ b/lib/antlr-2.7.5/antlr/CSharpCodeGenerator.java
@@ -3088,7 +3088,9 @@ else if (rblk.getDefaultErrorHandler())
 		}
 
 		if ( grammar.debuggingOutput || grammar.traceRules) {
+			if (grammar.buildAST) { 
 				println("ASTPair.PutInstance(currentAST);");
+			}
 			tabs--;
 			println("}");
 			println("finally");