diff --git a/docs/CONTRIBUTORS b/docs/CONTRIBUTORS
index d38aa425a..e4c77fb32 100644
--- a/docs/CONTRIBUTORS
+++ b/docs/CONTRIBUTORS
@@ -6,6 +6,7 @@ Please see the Verilator manual for 200+ additional contributors. Thanks to all.
 Ahmed El-Mahmoudy
 Alex Chadwick
 Chris Randall
+Dan Petrisko
 David Stanford
 Driss Hafdi
 Eric Rippey
diff --git a/include/verilated.cpp b/include/verilated.cpp
index 206e7335b..852cfb20e 100644
--- a/include/verilated.cpp
+++ b/include/verilated.cpp
@@ -29,6 +29,7 @@
 #include <algorithm>
 #include <cctype>
 #include <cerrno>
+#include <sstream>
 #include <tgmath.h>
 #include <sys/stat.h>  // mkdir