diff --git a/README.adoc b/README.adoc
index f1cc141..1724bb4 100644
--- a/README.adoc
+++ b/README.adoc
@@ -71,7 +71,7 @@ cmake --build .
 .cmake options:
 * `-DCMAKE_BUILD_TYPE=Debug` for a debug build.
 * `-DWITH_MAN=NO` to not compile the manpage.
-* `WITH_TESTS=YES` to compile the tests.
+* `-DWITH_TESTS=YES` to compile the tests.
 
 You can run the tests with `ctest` inside `build/tests`. Install with `make
 install`.