diff --git a/include/rapidjson/pointer.h b/include/rapidjson/pointer.h
index 66cbdef..6ee6abc 100644
--- a/include/rapidjson/pointer.h
+++ b/include/rapidjson/pointer.h
@@ -19,6 +19,8 @@
 
 RAPIDJSON_NAMESPACE_BEGIN
 
+static const SizeType kPointerInvalidIndex = ~SizeType(0);
+
 template <typename ValueType, typename Allocator = CrtAllocator>
 class GenericPointer {
 public:
@@ -28,11 +30,9 @@ public:
     struct Token {
         const Ch* name;
         SizeType length;
-        SizeType index;             //!< A valid index if not equal to kInvalidIndex.
+        SizeType index;             //!< A valid index if not equal to kPointerInvalidIndex.
     };
 
-    static const SizeType kInvalidIndex = -1;
-
     GenericPointer()
         : allocator_(),
         ownAllocator_(),
@@ -150,7 +150,7 @@ public:
         bool exist = true;
         for (Token *t = tokens_; t != tokens_ + tokenCount_; ++t) {
             if (v->GetType() != kObjectType && v->GetType() != kArrayType) {
-                if (t->index == kInvalidIndex)
+                if (t->index == kPointerInvalidIndex)
                     v->SetObject();
                 else
                     v->SetArray();
@@ -170,7 +170,7 @@ public:
                 }
                 break;
             case kArrayType:
-                if (t->index == kInvalidIndex) 
+                if (t->index == kPointerInvalidIndex) 
                     v->SetArray(); // Change to Array
                 if (t->index >= v->Size()) {
                     v->Reserve(t->index + 1, allocator);
@@ -207,7 +207,7 @@ public:
                 }
                 break;
             case kArrayType:
-                if (t->index == kInvalidIndex || t->index >= v->Size())
+                if (t->index == kPointerInvalidIndex || t->index >= v->Size())
                     return 0;
                 v = &((*v)[t->index]);
                 break;
@@ -307,7 +307,7 @@ private:
                 }
             }
 
-            token.index = isNumber ? n : kInvalidIndex;
+            token.index = isNumber ? n : kPointerInvalidIndex;
         }
 
         RAPIDJSON_ASSERT(name <= nameBuffer_ + length); // Should not overflow buffer
diff --git a/test/unittest/pointertest.cpp b/test/unittest/pointertest.cpp
index c23e9b8..98a006d 100644
--- a/test/unittest/pointertest.cpp
+++ b/test/unittest/pointertest.cpp
@@ -128,7 +128,7 @@ TEST(Pointer, Parse) {
         EXPECT_TRUE(p.IsValid());
         EXPECT_EQ(1u, p.GetTokenCount());
         EXPECT_STREQ("01", p.GetTokens()[0].name);
-        EXPECT_EQ(Pointer::kInvalidIndex, p.GetTokens()[0].index);
+        EXPECT_EQ(kPointerInvalidIndex, p.GetTokens()[0].index);
     }
 
     if (sizeof(SizeType) == 4) {
@@ -137,7 +137,7 @@ TEST(Pointer, Parse) {
         EXPECT_TRUE(p.IsValid());
         EXPECT_EQ(1u, p.GetTokenCount());
         EXPECT_STREQ("4294967296", p.GetTokens()[0].name);
-        EXPECT_EQ(Pointer::kInvalidIndex, p.GetTokens()[0].index);
+        EXPECT_EQ(kPointerInvalidIndex, p.GetTokens()[0].index);
     }
 }
 
@@ -167,7 +167,7 @@ TEST(Pointer, Stringify) {
 }
 
 // Construct a Pointer with static tokens, no dynamic allocation involved.
-#define NAME(s) { s, sizeof(s) / sizeof(s[0]) - 1, Pointer::kInvalidIndex }
+#define NAME(s) { s, sizeof(s) / sizeof(s[0]) - 1, kPointerInvalidIndex }
 #define INDEX(i) { #i, sizeof(#i) - 1, i }
 
 static const Pointer::Token kTokens[] = { NAME("foo"), INDEX(0) }; // equivalent to "/foo/0"