diff --git a/flang/lib/Lower/PFTBuilder.cpp b/flang/lib/Lower/PFTBuilder.cpp
index 8dfc8f77be8f6..b0bd5bec1694e 100644
--- a/flang/lib/Lower/PFTBuilder.cpp
+++ b/flang/lib/Lower/PFTBuilder.cpp
@@ -16,6 +16,7 @@
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/IntervalMap.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
 
 #define DEBUG_TYPE "flang-pft"
 
diff --git a/flang/lib/Optimizer/CodeGen/PreCGRewrite.cpp b/flang/lib/Optimizer/CodeGen/PreCGRewrite.cpp
index 37c6e43cb7acd..913e42b29dbc4 100644
--- a/flang/lib/Optimizer/CodeGen/PreCGRewrite.cpp
+++ b/flang/lib/Optimizer/CodeGen/PreCGRewrite.cpp
@@ -19,6 +19,7 @@
 #include "flang/Optimizer/Support/FIRContext.h"
 #include "mlir/Transforms/DialectConversion.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/Debug.h"
 
 //===----------------------------------------------------------------------===//
 // Codegen rewrite: rewriting of subgraphs of ops