diff --git a/src/drivers/CMakeLists.txt b/src/drivers/CMakeLists.txt
index f2e66f923..949b2312e 100644
--- a/src/drivers/CMakeLists.txt
+++ b/src/drivers/CMakeLists.txt
@@ -8,7 +8,7 @@ SD_ADD_SUBDIRECTORY(simplix)
 SD_ADD_SUBDIRECTORY(usr)
 
 # Work-in-progress / unofficial robots.
-IF(NOT OPTION_OFFICIAL_ONLY
+IF(NOT OPTION_OFFICIAL_ONLY)
 
   # Template robot (new framework).
   SD_ADD_SUBDIRECTORY(template)