diff --git a/test_tracetools/include/test_tracetools/mark_process.hpp b/test_tracetools/include/test_tracetools/mark_process.hpp
index 67217074..7ee9f454 100644
--- a/test_tracetools/include/test_tracetools/mark_process.hpp
+++ b/test_tracetools/include/test_tracetools/mark_process.hpp
@@ -15,8 +15,6 @@
 #ifndef TEST_TRACETOOLS__MARK_PROCESS_HPP_
 #define TEST_TRACETOOLS__MARK_PROCESS_HPP_
 
-#include <string>
-
 namespace test_tracetools
 {