diff --git a/Dangerfile b/Dangerfile
index 4aaefb8a0..614b16ef9 100644
--- a/Dangerfile
+++ b/Dangerfile
@@ -21,7 +21,7 @@ warn("This is a big PR, please consider splitting it up to ease code review.") i
 
 # Changelog entries are required for changes to source files.
 no_changelog_entry = !git.modified_files.include?("CHANGELOG.md")
-if has_changes_in_source_directory && no_changelog_entry && not_declared_trivial
+if has_changes_in_source_directory && no_changelog_entry && !declared_trivial
   fail("Any source code changes should have an entry in CHANGELOG.md or have #trivial in their title.")
 end