diff --git a/test/tools/llvm-rc/Inputs/deep-include.rc b/test/tools/llvm-rc/Inputs/deep-include.rc
index b28fa8f243a..5097a90f960 100644
Binary files a/test/tools/llvm-rc/Inputs/deep-include.rc and b/test/tools/llvm-rc/Inputs/deep-include.rc differ
diff --git a/test/tools/llvm-rc/Inputs/include-noquotes.rc b/test/tools/llvm-rc/Inputs/include-noquotes.rc
new file mode 100644
index 00000000000..11c971f32b3
Binary files /dev/null and b/test/tools/llvm-rc/Inputs/include-noquotes.rc differ
diff --git a/test/tools/llvm-rc/Inputs/nested/nested-bitmap.bmp b/test/tools/llvm-rc/Inputs/nested/nested_bitmap.bmp
similarity index 100%
rename from test/tools/llvm-rc/Inputs/nested/nested-bitmap.bmp
rename to test/tools/llvm-rc/Inputs/nested/nested_bitmap.bmp
diff --git a/test/tools/llvm-rc/include-paths.test b/test/tools/llvm-rc/include-paths.test
index f24cc449504..e6c52b12d6d 100644
--- a/test/tools/llvm-rc/include-paths.test
+++ b/test/tools/llvm-rc/include-paths.test
@@ -3,6 +3,11 @@
 ; RUN: llvm-rc /FO %t.include.res %p/Inputs/include.rc
 ; RUN: llvm-readobj %t.include.res | FileCheck --check-prefix=FOUND %s
 
+; Try including files without quotes.
+; RUN: rm -f %t.noquotes.res
+; RUN: llvm-rc /FO %t.noquotes.res %p/Inputs/include-noquotes.rc
+; RUN: llvm-readobj %t.noquotes.res | FileCheck --check-prefix=FOUND %s
+
 ; Should find the bitmap if the folder is explicitly specified.
 ; RUN: rm -f %t.nested-include.res
 ; RUN: llvm-rc /FO %t.nested-include.res /I %p/Inputs/nested %p/Inputs/deep-include.rc
@@ -41,4 +46,4 @@ FOUND-NEXT:   0050: FFFFFF0E C9FF0000 241CEDFF FFFF0000  |........$.......|
 FOUND-NEXT: )
 
 MISSING:      llvm-rc: Error in BITMAP statement (ID foo):
-MISSING-NEXT: error : file not found : nested-bitmap.bmp
+MISSING-NEXT: error : file not found : nested_bitmap.bmp
diff --git a/test/tools/llvm-rc/parser.test b/test/tools/llvm-rc/parser.test
index 112e4859a9b..66ed7386e82 100644
--- a/test/tools/llvm-rc/parser.test
+++ b/test/tools/llvm-rc/parser.test
@@ -145,11 +145,6 @@
 ; PLANGUAGE2:  llvm-rc: Error parsing file: expected '-', '~', integer or '(', got ,
 
 
-; RUN: not llvm-rc /dry-run /V %p/Inputs/parser-html-bad-string.rc 2>&1 | FileCheck %s --check-prefix PHTML1
-
-; PHTML1:  llvm-rc: Error parsing file: expected string, got ThisPassesInTheOriginalToolButDocSaysItShouldBeQuoted
-
-
 ; RUN: not llvm-rc /dry-run /V %p/Inputs/parser-html-extra-comma.rc 2>&1 | FileCheck %s --check-prefix PHTML2
 
 ; PHTML2:  llvm-rc: Error parsing file: expected string, got ,
diff --git a/tools/llvm-rc/ResourceScriptParser.cpp b/tools/llvm-rc/ResourceScriptParser.cpp
index ffa18bdf198..7123df9029a 100644
--- a/tools/llvm-rc/ResourceScriptParser.cpp
+++ b/tools/llvm-rc/ResourceScriptParser.cpp
@@ -214,6 +214,12 @@ Expected<StringRef> RCParser::readString() {
   return read().value();
 }
 
+Expected<StringRef> RCParser::readFilename() {
+  if (!isNextTokenKind(Kind::String) && !isNextTokenKind(Kind::Identifier))
+    return getExpectedError("string");
+  return read().value();
+}
+
 Expected<StringRef> RCParser::readIdentifier() {
   if (!isNextTokenKind(Kind::Identifier))
     return getExpectedError("identifier");
@@ -385,7 +391,7 @@ RCParser::ParseType RCParser::parseAcceleratorsResource() {
 }
 
 RCParser::ParseType RCParser::parseCursorResource() {
-  ASSIGN_OR_RETURN(Arg, readString());
+  ASSIGN_OR_RETURN(Arg, readFilename());
   return llvm::make_unique<CursorResource>(*Arg);
 }
 
@@ -427,8 +433,13 @@ RCParser::ParseType RCParser::parseUserDefinedResource(IntOrString Type) {
     return getExpectedError("filename, '{' or BEGIN");
 
   // Check if this is a file resource.
-  if (look().kind() == Kind::String)
+  switch (look().kind()) {
+  case Kind::String:
+  case Kind::Identifier:
     return llvm::make_unique<UserDefinedResource>(Type, read().value());
+  default:
+    break;
+  }
 
   RETURN_IF_ERROR(consumeType(Kind::BlockBegin));
   std::vector<IntOrString> Data;
@@ -487,17 +498,17 @@ Expected<Control> RCParser::parseControl() {
 }
 
 RCParser::ParseType RCParser::parseBitmapResource() {
-  ASSIGN_OR_RETURN(Arg, readString());
+  ASSIGN_OR_RETURN(Arg, readFilename());
   return llvm::make_unique<BitmapResource>(*Arg);
 }
 
 RCParser::ParseType RCParser::parseIconResource() {
-  ASSIGN_OR_RETURN(Arg, readString());
+  ASSIGN_OR_RETURN(Arg, readFilename());
   return llvm::make_unique<IconResource>(*Arg);
 }
 
 RCParser::ParseType RCParser::parseHTMLResource() {
-  ASSIGN_OR_RETURN(Arg, readString());
+  ASSIGN_OR_RETURN(Arg, readFilename());
   return llvm::make_unique<HTMLResource>(*Arg);
 }
 
diff --git a/tools/llvm-rc/ResourceScriptParser.h b/tools/llvm-rc/ResourceScriptParser.h
index e22619a5834..639ef63863c 100644
--- a/tools/llvm-rc/ResourceScriptParser.h
+++ b/tools/llvm-rc/ResourceScriptParser.h
@@ -84,6 +84,7 @@ private:
   Expected<RCInt> readInt();               // Parse an integer.
   Expected<StringRef> readString();        // Parse a string.
   Expected<StringRef> readIdentifier();    // Parse an identifier.
+  Expected<StringRef> readFilename();      // Parse a filename.
   Expected<IntOrString> readIntOrString(); // Parse an integer or a string.
   Expected<IntOrString> readTypeOrName();  // Parse an integer or an identifier.
 
diff --git a/tools/llvm-rc/ResourceScriptToken.cpp b/tools/llvm-rc/ResourceScriptToken.cpp
index 7bbf0d16f04..fc0a0e91845 100644
--- a/tools/llvm-rc/ResourceScriptToken.cpp
+++ b/tools/llvm-rc/ResourceScriptToken.cpp
@@ -281,13 +281,14 @@ bool Tokenizer::canStartIdentifier() const {
   assert(!streamEof());
 
   const char CurChar = Data[Pos];
-  return std::isalpha(CurChar) || CurChar == '_';
+  return std::isalpha(CurChar) || CurChar == '_' || CurChar == '.';
 }
 
 bool Tokenizer::canContinueIdentifier() const {
   assert(!streamEof());
   const char CurChar = Data[Pos];
-  return std::isalnum(CurChar) || CurChar == '_';
+  return std::isalnum(CurChar) || CurChar == '_' || CurChar == '.' ||
+         CurChar == '/' || CurChar == '\\';
 }
 
 bool Tokenizer::canStartInt() const {