diff --git a/README.md b/README.md
index f294a33039d..a67b4a8b73c 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ Download dependencies:
 
 	./gradlew dependencies:update
 
-Then build the compiler
+Then build the compiler:
 
 	./gradlew dist
 
@@ -12,6 +12,10 @@ After that you should be able to compile your programs like that:
 
 	./dist/bin/konanc hello.kt -o hello
 
+For an optimized compilation use -opt:
+
+	./dist/bin/konanc hello.kt -o hello -opt
+
 For more tests, use:
 
 	./gradlew backend.native:tests:run