diff --git a/chapters/projects/submodule.md b/chapters/projects/submodule.md
index c87bd92..5940c9d 100644
--- a/chapters/projects/submodule.md
+++ b/chapters/projects/submodule.md
@@ -26,7 +26,7 @@ if(GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
     endif()
 endif()
 
-if(NOT EXISTS "${PROJECT_SOURCE_DIR}/extern/repo/CMakeLists.txt"
+if(NOT EXISTS "${PROJECT_SOURCE_DIR}/extern/repo/CMakeLists.txt")
     message(FATAL_ERROR "The submodules were not downloaded! GIT_SUBMODULE was turned off or failed. Please update submodules and try again.")
 endif()
 ```