diff --git a/otherarch/ttscpp/src/phonemizer.cpp b/otherarch/ttscpp/src/phonemizer.cpp
index dcade6f41..aafa1416b 100644
--- a/otherarch/ttscpp/src/phonemizer.cpp
+++ b/otherarch/ttscpp/src/phonemizer.cpp
@@ -1,5 +1,7 @@
 #include "phonemizer.h"
 
+#include <fstream>
+
 #ifdef ESPEAK_INSTALL
 /**
  * espeak_wrapper functions and assignments