diff --git a/clang/lib/Frontend/TextDiagnostic.cpp b/clang/lib/Frontend/TextDiagnostic.cpp
--- a/clang/lib/Frontend/TextDiagnostic.cpp
+++ b/clang/lib/Frontend/TextDiagnostic.cpp
@@ -868,10 +868,11 @@
 }
 
 void TextDiagnostic::emitIncludeLocation(FullSourceLoc Loc, PresumedLoc PLoc) {
-  if (DiagOpts->ShowLocation && PLoc.isValid())
-    OS << "In file included from " << PLoc.getFilename() << ':'
-       << PLoc.getLine() << ":\n";
-  else
+  if (DiagOpts->ShowLocation && PLoc.isValid()) {
+    OS << "In file included from ";
+    emitFilename(PLoc.getFilename(), Loc.getManager());
+    OS << ':' << PLoc.getLine() << ":\n";
+  } else
     OS << "In included file:\n";
 }
 
diff --git a/clang/test/Frontend/absolute-paths-import.h b/clang/test/Frontend/absolute-paths-import.h
new file mode 100644
--- /dev/null
+++ b/clang/test/Frontend/absolute-paths-import.h
@@ -0,0 +1 @@
+#warning abc
diff --git a/clang/test/Frontend/absolute-paths.c b/clang/test/Frontend/absolute-paths.c
--- a/clang/test/Frontend/absolute-paths.c
+++ b/clang/test/Frontend/absolute-paths.c
@@ -1,5 +1,10 @@
-// RUN: %clang_cc1 -fsyntax-only -I %S/Inputs/SystemHeaderPrefix/.. %s 2>&1 | FileCheck -check-prefix=NORMAL -check-prefix=CHECK %s
-// RUN: %clang_cc1 -fsyntax-only -I %S/Inputs/SystemHeaderPrefix/.. -fdiagnostics-absolute-paths %s 2>&1 | FileCheck -check-prefix=ABSOLUTE -check-prefix=CHECK %s
+// RUN: %clang_cc1 -fsyntax-only -I %S/Inputs/SystemHeaderPrefix/.. %s 2>&1 | FileCheck -DROOT_ABSOLUTE=%s -check-prefix=NORMAL -check-prefix=CHECK %s
+// RUN: %clang_cc1 -fsyntax-only -I %S/Inputs/SystemHeaderPrefix/.. -fdiagnostics-absolute-paths %s 2>&1 | FileCheck -DROOT_ABSOLUTE=%s -check-prefix=ABSOLUTE -check-prefix=CHECK %s
+
+#include "absolute-paths-import.h"
+// NORMAL: In file included from {{.*}}absolute-paths.c:4:
+// NORMAL-NOT: In file included from [[ROOT_ABSOLUTE]]:4:
+// ABSOLUTE: In file included from [[ROOT_ABSOLUTE]]:4:
 
 #include "absolute-paths.h"