1 files changed, 4 insertions, 1 deletions
diff --git a/cpp/src/Slice/Parser.cpp b/cpp/src/Slice/Parser.cpp
index 540f396f474..8c3c4ccaa7a 100644
--- a/cpp/src/Slice/Parser.cpp
+++ b/cpp/src/Slice/Parser.cpp
@@ -916,8 +916,11 @@ Slice::Parser::includeFiles()
 }
 
 int
-Slice::Parser::parse(FILE* file)
+Slice::Parser::parse(FILE* file, bool debug)
 {
+    extern int yydebug;
+    yydebug = debug ? 1 : 0;
+
     assert(!Slice::parser);
     Slice::parser = this;