diff --git a/src/common/bspf.hxx b/src/common/bspf.hxx
index 137a3a475..4cbd758df 100644
--- a/src/common/bspf.hxx
+++ b/src/common/bspf.hxx
@@ -67,6 +67,7 @@
 #include <iostream>
 #include <iomanip>
 #include <string>
+#include <cstring>
 #include <cctype>
 using namespace std;