6 files changed, 8 insertions, 8 deletions
diff --git a/src/mongo/base/clonable_ptr.h b/src/mongo/base/clonable_ptr.h
index 135fd272fa0..42b0c63c1db 100644
--- a/src/mongo/base/clonable_ptr.h
+++ b/src/mongo/base/clonable_ptr.h
@@ -63,7 +63,7 @@ struct detect_clone_factory_type_member_impl {
     template <typename U>
     static Yes& test(U*);
 
-    static constexpr bool value = sizeof(test<Derived>(0)) == sizeof(Yes);
+    static constexpr bool value = sizeof(test<Derived>(nullptr)) == sizeof(Yes);
 
     using type = typename std::integral_constant<bool, value>::type;
 };
diff --git a/src/mongo/base/owned_pointer_vector.h b/src/mongo/base/owned_pointer_vector.h
index 199e172e4c3..929606ec520 100644
--- a/src/mongo/base/owned_pointer_vector.h
+++ b/src/mongo/base/owned_pointer_vector.h
@@ -157,7 +157,7 @@ public:
      */
     T* releaseAt(size_t i) {
         T* out = _vector[i];
-        _vector[i] = NULL;
+        _vector[i] = nullptr;
         return out;
     }
 
diff --git a/src/mongo/base/owned_pointer_vector_test.cpp b/src/mongo/base/owned_pointer_vector_test.cpp
index 5838785725e..c11bda6fb6f 100644
--- a/src/mongo/base/owned_pointer_vector_test.cpp
+++ b/src/mongo/base/owned_pointer_vector_test.cpp
@@ -290,7 +290,7 @@ TEST(OwnedPointerVectorTest, ReleaseAt) {
         holder.reset(owned.releaseAt(1));
         ASSERT_EQUALS(0U, DestructionLogger::destroyedNames().size());
         ASSERT_EQUALS(3U, owned.size());
-        ASSERT_EQUALS(static_cast<DestructionLogger*>(NULL), owned[1]);
+        ASSERT_EQUALS(static_cast<DestructionLogger*>(nullptr), owned[1]);
 
         // owned destroyed
     }
diff --git a/src/mongo/base/status.h b/src/mongo/base/status.h
index 52a46d0adb0..d3faa8fd0ec 100644
--- a/src/mongo/base/status.h
+++ b/src/mongo/base/status.h
@@ -312,7 +312,7 @@ inline unsigned Status::refCount() const {
     return _error ? _error->refs.load() : 0;
 }
 
-inline Status::Status() : _error(NULL) {}
+inline Status::Status() : _error(nullptr) {}
 
 inline void Status::ref(ErrorInfo* error) {
     if (error)
diff --git a/src/mongo/base/string_data.h b/src/mongo/base/string_data.h
index 4192ccd60f6..3a943348680 100644
--- a/src/mongo/base/string_data.h
+++ b/src/mongo/base/string_data.h
@@ -279,7 +279,7 @@ inline size_t StringData::find(char c, size_t fromPos) const {
         return std::string::npos;
 
     const void* x = memchr(_data + fromPos, c, _size - fromPos);
-    if (x == 0)
+    if (x == nullptr)
         return std::string::npos;
     return static_cast<size_t>(static_cast<const char*>(x) - _data);
 }
diff --git a/src/mongo/base/string_data_test.cpp b/src/mongo/base/string_data_test.cpp
index a1d9d7d7773..b0cfac8467a 100644
--- a/src/mongo/base/string_data_test.cpp
+++ b/src/mongo/base/string_data_test.cpp
@@ -42,7 +42,7 @@ using std::string;
 TEST(Construction, Empty) {
     StringData strData;
     ASSERT_EQUALS(strData.size(), 0U);
-    ASSERT_TRUE(strData.rawData() == NULL);
+    ASSERT_TRUE(strData.rawData() == nullptr);
 }
 
 TEST(Construction, FromStdString) {
@@ -60,10 +60,10 @@ TEST(Construction, FromCString) {
 }
 
 TEST(Construction, FromNullCString) {
-    char* c = NULL;
+    char* c = nullptr;
     StringData strData(c);
     ASSERT_EQUALS(strData.size(), 0U);
-    ASSERT_TRUE(strData.rawData() == NULL);
+    ASSERT_TRUE(strData.rawData() == nullptr);
 }
 
 TEST(Construction, FromUserDefinedLiteral) {