diff --git a/frontends/verilog/verilog_location.h b/frontends/verilog/verilog_location.h
index 9b530fbeb..8ffe0552d 100644
--- a/frontends/verilog/verilog_location.h
+++ b/frontends/verilog/verilog_location.h
@@ -5,6 +5,7 @@
 #include <string>
 #include <stack>
 #include <string>
+#include <sstream>
 
 /**
  * Provide frontend-wide location tracking like what bison generates