diff --git a/SignalServiceKit/src/Contacts/Contact.h b/SignalServiceKit/src/Contacts/Contact.h
index 72b5a31f8..6e064dd7f 100644
--- a/SignalServiceKit/src/Contacts/Contact.h
+++ b/SignalServiceKit/src/Contacts/Contact.h
@@ -49,6 +49,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 + (NSComparator)comparatorSortingNamesByFirstThenLast:(BOOL)firstNameOrdering;
 + (NSString *)formattedFullNameWithCNContact:(CNContact *)cnContact NS_SWIFT_NAME(formattedFullName(cnContact:));
++ (nullable NSString *)localizedStringForCNLabel:(nullable NSString *)cnLabel;
 
 - (CNContact *)buildCNContactMergedWithNewContact:(CNContact *)newCNContact NS_SWIFT_NAME(buildCNContact(mergedWithNewContact:));
 
diff --git a/SignalServiceKit/src/Contacts/Contact.m b/SignalServiceKit/src/Contacts/Contact.m
index d2c76272d..0f6e45621 100644
--- a/SignalServiceKit/src/Contacts/Contact.m
+++ b/SignalServiceKit/src/Contacts/Contact.m
@@ -395,6 +395,27 @@ NS_ASSUME_NONNULL_BEGIN
     return [mergedCNContact copy];
 }
 
++ (nullable NSString *)localizedStringForCNLabel:(nullable NSString *)cnLabel
+{
+    if (cnLabel.length == 0) {
+        return nil;
+    }
+
+    NSString *_Nullable localizedLabel = [CNLabeledValue localizedStringForLabel:cnLabel];
+
+    // Docs for localizedStringForLabel say it returns:
+    // > The localized string if a Contacts framework defined label, otherwise just returns the label.
+    // But in practice, at least on iOS11, if the label is not one of CNContacts known labels (like CNLabelHome)
+    // kUnlocalizedStringLabel is returned, rather than the unadultered label.
+    NSString *const kUnlocalizedStringLabel = @"__ABUNLOCALIZEDSTRING";
+
+    if ([localizedLabel isEqual:kUnlocalizedStringLabel]) {
+        return cnLabel;
+    }
+
+    return localizedLabel;
+}
+
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/SignalServiceKit/src/Messages/Interactions/OWSContact.m b/SignalServiceKit/src/Messages/Interactions/OWSContact.m
index ac1b088e5..adfefa277 100644
--- a/SignalServiceKit/src/Messages/Interactions/OWSContact.m
+++ b/SignalServiceKit/src/Messages/Interactions/OWSContact.m
@@ -610,9 +610,7 @@ NSString *NSStringForContactAddressType(OWSContactAddressType value)
             phoneNumber.phoneType = OWSContactPhoneType_Mobile;
         } else {
             phoneNumber.phoneType = OWSContactPhoneType_Custom;
-            if (phoneNumberField.label) {
-                phoneNumber.label = [CNLabeledValue localizedStringForLabel:phoneNumberField.label];
-            }
+            phoneNumber.label = [Contact localizedStringForCNLabel:phoneNumberField.label];
         }
         [phoneNumbers addObject:phoneNumber];
     }
@@ -628,9 +626,7 @@ NSString *NSStringForContactAddressType(OWSContactAddressType value)
             email.emailType = OWSContactEmailType_Work;
         } else {
             email.emailType = OWSContactEmailType_Custom;
-            if (emailField.label) {
-                email.label = [CNLabeledValue localizedStringForLabel:emailField.label];
-            }
+            email.label = [Contact localizedStringForCNLabel:emailField.label];
         }
         [emails addObject:email];
     }
@@ -656,9 +652,7 @@ NSString *NSStringForContactAddressType(OWSContactAddressType value)
             address.addressType = OWSContactAddressType_Work;
         } else {
             address.addressType = OWSContactAddressType_Custom;
-            if (addressField.label) {
-                address.label = [CNLabeledValue localizedStringForLabel:addressField.label];
-            }
+            address.label = [Contact localizedStringForCNLabel:addressField.label];
         }
         [addresses addObject:address];
     }