diff --git a/mlir/lib/IR/BuiltinAttributes.cpp b/mlir/lib/IR/BuiltinAttributes.cpp
index 7c7264876bc9..cfbe942743f2 100644
--- a/mlir/lib/IR/BuiltinAttributes.cpp
+++ b/mlir/lib/IR/BuiltinAttributes.cpp
@@ -15,6 +15,7 @@
 #include "mlir/IR/IntegerSet.h"
 #include "mlir/IR/Types.h"
 #include "mlir/Interfaces/DecodeAttributesInterfaces.h"
+#include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/Sequence.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/Endian.h"