diff --git a/project/makefile b/project/makefile
index b3e2877..5edc288 100644
--- a/project/makefile
+++ b/project/makefile
@@ -22,7 +22,7 @@ OBJECTS = $(SRC_DIR)/basecode.cpp	\
 	  $(SRC_DIR)/support.cpp	\
 	  $(SRC_DIR)/waypoint.cpp	\
 
-C_OPT_FLAGS =  -O3 -DNDEBUG=1 -fno-exceptions -fno-rtti -funroll-loops -fomit-frame-pointer -pipe -mtune=native
+C_OPT_FLAGS =  -O2 -DNDEBUG=1 -fno-exceptions -fno-rtti -funroll-loops -fomit-frame-pointer -pipe -mtune=native
 C_DEBUG_FLAGS = -D_DEBUG -DDEBUG -g -ggdb3
 C_GCC4_FLAGS = -fvisibility=hidden
 CPP_GCC4_FLAGS = -fvisibility-inlines-hidden