diff --git a/plugins/input/csv/csv_utils.cpp b/plugins/input/csv/csv_utils.cpp
index 382b1ce2d..6b17f4b6c 100644
--- a/plugins/input/csv/csv_utils.cpp
+++ b/plugins/input/csv/csv_utils.cpp
@@ -40,6 +40,9 @@
 #include <cstdio>
 #include <algorithm>
 
+// boost string algo
+#include <boost/algorithm/string/trim.hpp>
+
 namespace csv_utils {
 namespace detail {