diff --git a/CMakeLists.txt b/CMakeLists.txt
index 144e081..3848e77 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@ option(KASSERT_BUILD_TESTS "Build the tests." ${PROJECT_IS_TOP_LEVEL})
 option(KASSERT_BUILD_DOCS "Build the tests." ${PROJECT_IS_TOP_LEVEL})
 
 if (KASSERT_BUILD_DOCS)
-  add_subdirectory(docs)
+    add_subdirectory(docs)
 endif ()
 
 add_library(kassert INTERFACE)