diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 3167e03ca449..689ecbcd7949 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -59,6 +59,15 @@ Driver::Driver(StringRef ClangExecutable,
 
   Name = llvm::sys::path::stem(ClangExecutable);
   Dir  = llvm::sys::path::parent_path(ClangExecutable);
+
+  // Compute the path to the resource directory.
+  StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
+  SmallString<128> P(Dir);
+  if (ClangResourceDir != "")
+    llvm::sys::path::append(P, ClangResourceDir);
+  else
+    llvm::sys::path::append(P, "..", "lib", "clang", CLANG_VERSION_STRING);
+  ResourceDir = P.str();
 }
 
 Driver::~Driver() {
@@ -282,18 +291,8 @@ Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
   if (Args->hasArg(options::OPT_nostdlib))
     UseStdLib = false;
 
-  // Compute the path to the resource directory. We used to do this in
-  // Driver::Driver(), but that's not right, as command line args (such as
-  // ccc-install-dir) can change 'Dir'.
-  StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
-  SmallString<128> P(Dir);
   if (const Arg *A = Args->getLastArg(options::OPT_resource_dir))
-    P = A->getValue();
-  else if (!ClangResourceDir.empty())
-    llvm::sys::path::append(P, ClangResourceDir);
-  else
-    llvm::sys::path::append(P, "..", "lib", "clang", CLANG_VERSION_STRING);
-  ResourceDir = P.str();
+    ResourceDir = A->getValue();
 
   // Perform the default argument translations.
   DerivedArgList *TranslatedArgs = TranslateInputArgs(*Args);
diff --git a/clang/test/Driver/resource-dir.cpp b/clang/test/Driver/resource-dir.cpp
deleted file mode 100644
index 106e88399551..000000000000
--- a/clang/test/Driver/resource-dir.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-// RUN: %clang %s -fsyntax-only -### 2> %t.log
-// RUN: FileCheck %s --check-prefix=CHECK-DEFAULT < %t.log
-
-// CHECK-DEFAULT: "-resource-dir" "{{.+}}/../lib/clang/{{.+}}"
-
-// RUN: %clang %s -fsyntax-only -ccc-install-dir /my/install/dir -### 2> %t.log
-// RUN: FileCheck %s --check-prefix=CHECK-INSTALL-DIR < %t.log
-// CHECK-INSTALL-DIR: "-resource-dir" "/my/install/dir{{[\\/]+}}..{{[\\/]+}}lib{{[\\/]+}}clang{{[\\/]+.+}}"
-
-void foo(void) {}