Index: lib/Basic/Targets/OSTargets.h
===================================================================
--- lib/Basic/Targets/OSTargets.h
+++ lib/Basic/Targets/OSTargets.h
@@ -632,7 +632,11 @@
 public:
   SolarisTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
       : OSTargetInfo<Target>(Triple, Opts) {
-    // FIXME: WIntType should be SignedLong
+    if (this->PointerWidth == 64) {
+      this->WCharType = this->WIntType = this->SignedInt;
+    } else {
+      this->WCharType = this->WIntType = this->SignedLong;
+    }
     switch (Triple.getArch()) {
     default:
       break;
Index: test/Preprocessor/wchar_t.c
===================================================================
--- test/Preprocessor/wchar_t.c
+++ test/Preprocessor/wchar_t.c
@@ -1,8 +1,13 @@
 // RUN: %clang_cc1 -triple i386-pc-solaris -dM -E %s -o - | FileCheck %s -check-prefix CHECK-SOLARIS
 // CHECK-SOLARIS-DAG: #define __WCHAR_MAX__ 2147483647
-// CHECK-SOLARIS-DAG: #define __WCHAR_TYPE__ int
+// CHECK-SOLARIS-DAG: #define __WCHAR_TYPE__ long int
 // CHECK-SOLARIS-NOT: #define __WCHAR_UNSIGNED__ 0
 
+// RUN: %clang_cc1 -triple x86_64-pc-solaris -dM -E %s -o - | FileCheck %s -check-prefix CHECK-SOLARIS64
+// CHECK-SOLARIS64-DAG: #define __WCHAR_MAX__ 2147483647
+// CHECK-SOLARIS64-DAG: #define __WCHAR_TYPE__ int
+// CHECK-SOLARIS64-NOT: #define __WCHAR_UNSIGNED__ 0
+
 // RUN: %clang_cc1 -triple avr-unknown-unknown -fwchar-type=int -fsigned-wchar -dM -E %s -o - | FileCheck %s -check-prefix CHECK-AVR
 // CHECK-AVR-DAG: #define __WCHAR_MAX__ 32767
 // CHECK-AVR-DAG: #define __WCHAR_TYPE__ int
Index: test/Sema/wchar.c
===================================================================
--- test/Sema/wchar.c
+++ test/Sema/wchar.c
@@ -9,7 +9,11 @@
 #elif defined(__arm) || defined(__aarch64__)
   #define WCHAR_T_TYPE unsigned int
 #elif defined(__sun)
-  #define WCHAR_T_TYPE long
+  #if defined(__LP64__)
+    #define WCHAR_T_TYPE int
+  #else
+    #define WCHAR_T_TYPE long
+  #endif
 #else /* Solaris. */
   #define WCHAR_T_TYPE int
 #endif