diff --git a/torchtext/csrc/sentencepiece.cpp b/torchtext/csrc/sentencepiece.cpp
index f5d279a955..06237b5d32 100644
--- a/torchtext/csrc/sentencepiece.cpp
+++ b/torchtext/csrc/sentencepiece.cpp
@@ -1,3 +1,4 @@
+#include <sentencepiece_processor.h>
 #include <sentencepiece_trainer.h>
 #include <torch/script.h>