diff --git a/src/BitcodeEmitter.cpp b/src/BitcodeEmitter.cpp
index 60c55bb..1eb18c2 100644
--- a/src/BitcodeEmitter.cpp
+++ b/src/BitcodeEmitter.cpp
@@ -32,6 +32,7 @@
 #include <llvm/Analysis/Passes.h>
 
 #include <cassert>
+#include <iostream>
 #include <string>
 #include <map>
 #include <vector>