diff --git a/src/lib/netlist/plib/putil.cpp b/src/lib/netlist/plib/putil.cpp
index 457e3c62ca1..e0388ba9610 100644
--- a/src/lib/netlist/plib/putil.cpp
+++ b/src/lib/netlist/plib/putil.cpp
@@ -7,6 +7,7 @@
 #include "ptypes.h"
 
 #include <algorithm>
+#include <cstdlib>
 #include <initializer_list>
 
 namespace plib