diff --git a/llvm/utils/TableGen/X86RecognizableInstr.cpp b/llvm/utils/TableGen/X86RecognizableInstr.cpp
index 4fe3a07664ba..309d5f0b1b4f 100644
--- a/llvm/utils/TableGen/X86RecognizableInstr.cpp
+++ b/llvm/utils/TableGen/X86RecognizableInstr.cpp
@@ -19,6 +19,7 @@
 #include "X86ModRMFilters.h"
 #include "llvm/Support/ErrorHandling.h"
 #include <string>
+#include <stdio.h>
 
 using namespace llvm;