diff --git a/CMakeLists.txt b/CMakeLists.txt
index cfdc53a..f432754 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -86,7 +86,7 @@ include_directories(
 )
 
 add_definitions(
-    -Wall -Wextra -Werror -Wno-deprecated-register -std=c++0x -DYYDEBUG=0 -O2
+    -Wall -Wextra -Werror -Wno-unused-parameter -Wno-deprecated-register -std=c++0x -DYYDEBUG=0 -O2
 )
 
 bison_target(Parser Monicelli.ypp ${CMAKE_CURRENT_BINARY_DIR}/Parser.cpp)