diff --git a/sonar-project.properties b/sonar-project.properties
index 7ea4cd8..7abbf34 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -3,6 +3,6 @@ sonar.projectKey=jeremy-rifkin_cpptrace
 
 # relative paths to source directories. More details and properties are described
 # in https://sonarcloud.io/documentation/project-administration/narrowing-the-focus/
-sonar.sources=src
+sonar.sources=src, include
 sonar.sourceEncoding=UTF-8
 sonar.cfamily.compile-commands=build/compile_commands.json