diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -497,6 +497,8 @@
 - CallExpr built for C error-recovery now is always type-dependent. Fixes a
   crash when we encounter a unresolved TypoExpr during diagnostic emission.
   (`#50244 <https://github.com/llvm/llvm-project/issues/50244>_`).
+- Fix lambdas in template arguments not respecting ``-fmacro-prefix-map``
+  (`#63219 <https://github.com/llvm/llvm-project/issues/63219>`_)
 
 Bug Fixes to Compiler Builtins
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -786,7 +786,21 @@
         Out << "static ";
     }
 
+    class PrettyCallbacks final : public PrintingCallbacks {
+    public:
+      PrettyCallbacks(const LangOptions &LO) : LO(LO) {}
+      std::string remapPath(StringRef Path) const override {
+        SmallString<128> p(Path);
+        LO.remapPathPrefix(p);
+        return std::string(p);
+      }
+
+    private:
+      const LangOptions &LO;
+    };
     PrintingPolicy Policy(Context.getLangOpts());
+    PrettyCallbacks PrettyCB(Context.getLangOpts());
+    Policy.Callbacks = &PrettyCB;
     std::string Proto;
     llvm::raw_string_ostream POut(Proto);
 
diff --git a/clang/test/CodeGenCXX/file-prefix-map-lambda.cpp b/clang/test/CodeGenCXX/file-prefix-map-lambda.cpp
new file mode 100644
--- /dev/null
+++ b/clang/test/CodeGenCXX/file-prefix-map-lambda.cpp
@@ -0,0 +1,14 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-freebsd -fmacro-prefix-map=%p=./UNLIKELY_PATH/empty -S %s -emit-llvm -o - | FileCheck %s
+
+template<typename f>
+auto lambdatest(f&& cb) {
+  const char *s = __PRETTY_FUNCTION__;
+  return s;
+}
+
+int main() {
+  auto *s = lambdatest([](){});
+// CHECK: @"__PRETTY_FUNCTION__._Z10lambdatestIZ4mainE3$_0EDaOT_" = private unnamed_addr constant [{{[0-9]+}} x i8] c"auto lambdatest(f &&) [f = (lambda at ./UNLIKELY_PATH/empty{{/|\\\\}}{{.*}}.cpp:10:24)]\00", align 1
+
+  return 0;
+}