diff --git a/llvm/tools/llvm-profgen/PerfReader.cpp b/llvm/tools/llvm-profgen/PerfReader.cpp
--- a/llvm/tools/llvm-profgen/PerfReader.cpp
+++ b/llvm/tools/llvm-profgen/PerfReader.cpp
@@ -9,6 +9,7 @@
 #include "ProfileGenerator.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Process.h"
+#include <bits/stdint-uintn.h>
 
 #define DEBUG_TYPE "perf-reader"
 
@@ -905,8 +906,8 @@
            "Branch' source should not be an external address, it should be "
            "converted to aritificial branch.");
     uint64_t SourceOffset = Binary->virtualAddrToOffset(LBR.Source);
-    uint64_t TargetOffset = LBR.Target == ExternalAddr
-                                ? ExternalAddr
+    uint64_t TargetOffset = LBR.Target == static_cast<uint64_t>(ExternalAddr)
+                                ? static_cast<uint64_t>(ExternalAddr)
                                 : Binary->virtualAddrToOffset(LBR.Target);
 
     if (!LBR.IsArtificial && TargetOffset != ExternalAddr) {