diff --git a/lllc/main.cpp b/lllc/main.cpp
index 380a0ba26..3821d6a3c 100644
--- a/lllc/main.cpp
+++ b/lllc/main.cpp
@@ -41,7 +41,7 @@ void help()
 		<< "    -x,--hex  Parse, compile and assemble; output byte code in hex." << endl
 		<< "    -a,--assembly  Only parse and compile; show assembly." << endl
 		<< "    -t,--parse-tree  Only parse; show parse tree." << endl
-		<< "    -o,--optimise  Turn on/off the optimiser; on by default." << endl
+		<< "    -o,--optimise  Turn on/off the optimiser; off by default." << endl
 		<< "    -h,--help  Show this help message and exit." << endl
 		<< "    -V,--version  Show the version and exit." << endl;
         exit(0);
@@ -82,7 +82,7 @@ enum Mode { Binary, Hex, Assembly, ParseTree, Disassemble };
 int main(int argc, char** argv)
 {
 	setDefaultOrCLocale();
-	unsigned optimise = 1;
+	unsigned optimise = 0;
 	string infile;
 	Mode mode = Hex;