diff --git a/clang/lib/AST/Interp/Source.h b/clang/lib/AST/Interp/Source.h
index e97e897e72394..fec950dd544f8 100644
--- a/clang/lib/AST/Interp/Source.h
+++ b/clang/lib/AST/Interp/Source.h
@@ -14,12 +14,12 @@
 #define LLVM_CLANG_AST_INTERP_SOURCE_H
 
 #include "PrimType.h"
+#include "clang/AST/DeclBase.h"
+#include "clang/AST/Stmt.h"
 #include "llvm/ADT/PointerUnion.h"
 #include "llvm/Support/Endian.h"
 
 namespace clang {
-class Stmt;
-class Decl;
 class Expr;
 class SourceLocation;
 class SourceRange;