diff --git a/src/llvmcalltest.cpp b/src/llvmcalltest.cpp
index b5895bbd22074..fee0fed72c0d9 100644
--- a/src/llvmcalltest.cpp
+++ b/src/llvmcalltest.cpp
@@ -6,6 +6,7 @@
 
 #include "llvm/Config/llvm-config.h"
 #include "llvm/IR/IRBuilder.h"
+#include <llvm/Support/raw_ostream.h>
 
 #include "julia.h"
 #include "codegen_shared.h"