diff --git a/CMakeLists.txt b/CMakeLists.txt
index 410c6afa17e..336b8bd06d3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -237,7 +237,7 @@ endif()
 include(CPack)
 
 # Sanity check our source directory to make sure that we are not trying to
-# generate an in-tree build (unless on MSVC_IDE, where it is ok), and to make
+# generate an in-source build (unless on MSVC_IDE, where it is ok), and to make
 # sure that we don't have any stray generated files lying around in the tree
 # (which would end up getting picked up by header search, instead of the correct
 # versions).