diff --git a/Signal/src/AppDelegate.m b/Signal/src/AppDelegate.m
index 82f632c69..4e9ef4246 100644
--- a/Signal/src/AppDelegate.m
+++ b/Signal/src/AppDelegate.m
@@ -836,8 +836,7 @@ static NSString *const kURLHostVerifyPrefix             = @"verify";
     self.isEnvironmentSetup = YES;
 
     [OWSProfileManager.sharedManager fetchLocalUsersProfile];
-    // Make sure this manager is started.
-    [OWSReadReceiptManager sharedManager];
+    [[OWSReadReceiptManager sharedManager] prepareCachedValues];
 }
 
 - (void)registrationStateDidChange
diff --git a/Signal/src/ViewControllers/ConversationView/ConversationViewController.m b/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
index ce447310d..3f22d3c35 100644
--- a/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
+++ b/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
@@ -2134,7 +2134,8 @@ typedef NS_ENUM(NSInteger, MessagesRangeSizeMode) {
                     ? NSLocalizedString(@"MESSAGE_STATUS_DELIVERED", @"message footer for delivered messages")
                     : NSLocalizedString(@"MESSAGE_STATUS_SENT", @"message footer for sent messages"));
             NSAttributedString *result = [[NSAttributedString alloc] initWithString:text];
-            if (outgoingMessage.wasDelivered && outgoingMessage.readRecipientIds.count > 0) {
+            if ([OWSReadReceiptManager.sharedManager areReadReceiptsEnabled] && outgoingMessage.wasDelivered
+                && outgoingMessage.readRecipientIds.count > 0) {
                 NSAttributedString *checkmark = [[NSAttributedString alloc]
                     initWithString:@"\uf00c "
                         attributes:@{
diff --git a/SignalServiceKit/src/Messages/OWSReadReceiptManager.h b/SignalServiceKit/src/Messages/OWSReadReceiptManager.h
index 60dda0bf9..55be7af2c 100644
--- a/SignalServiceKit/src/Messages/OWSReadReceiptManager.h
+++ b/SignalServiceKit/src/Messages/OWSReadReceiptManager.h
@@ -57,6 +57,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 #pragma mark - Settings
 
+- (void)prepareCachedValues;
+
 - (BOOL)areReadReceiptsEnabled;
 - (void)setAreReadReceiptsEnabled:(BOOL)value;
 
diff --git a/SignalServiceKit/src/Messages/OWSReadReceiptManager.m b/SignalServiceKit/src/Messages/OWSReadReceiptManager.m
index 6bb828899..6b961e28a 100644
--- a/SignalServiceKit/src/Messages/OWSReadReceiptManager.m
+++ b/SignalServiceKit/src/Messages/OWSReadReceiptManager.m
@@ -114,8 +114,7 @@ NSString *const OWSReadReceiptManagerAreReadReceiptsEnabled = @"areReadReceiptsE
 // Should only be accessed while synchronized on the OWSReadReceiptManager.
 @property (nonatomic) BOOL isProcessing;
 
-// Should only be accessed while synchronized on the OWSReadReceiptManager.
-@property (nonatomic) NSNumber *areReadReceiptsEnabledCached;
+@property (atomic) NSNumber *areReadReceiptsEnabledCached;
 
 @end
 
@@ -425,32 +424,31 @@ NSString *const OWSReadReceiptManagerAreReadReceiptsEnabled = @"areReadReceiptsE
 
 #pragma mark - Settings
 
-- (BOOL)areReadReceiptsEnabled
+- (void)prepareCachedValues
 {
-    @synchronized(self)
-    {
-        if (!self.areReadReceiptsEnabledCached) {
-            // Default to NO.
-            self.areReadReceiptsEnabledCached =
-                @([self.dbConnection boolForKey:OWSReadReceiptManagerAreReadReceiptsEnabled
-                                   inCollection:OWSReadReceiptManagerCollection]);
-        }
+    [self areReadReceiptsEnabled];
+}
 
-        return [self.areReadReceiptsEnabledCached boolValue];
+- (BOOL)areReadReceiptsEnabled
+{
+    // We don't need to worry about races around this cached value.
+    if (!self.areReadReceiptsEnabledCached) {
+        // Default to NO.
+        self.areReadReceiptsEnabledCached = @([self.dbConnection boolForKey:OWSReadReceiptManagerAreReadReceiptsEnabled
+                                                               inCollection:OWSReadReceiptManagerCollection]);
     }
+
+    return [self.areReadReceiptsEnabledCached boolValue];
 }
 
 - (void)setAreReadReceiptsEnabled:(BOOL)value
 {
     DDLogInfo(@"%@ areReadReceiptsEnabled: %d.", self.tag, value);
 
-    @synchronized(self)
-    {
-        [self.dbConnection setBool:value
-                            forKey:OWSReadReceiptManagerAreReadReceiptsEnabled
-                      inCollection:OWSReadReceiptManagerCollection];
-        self.areReadReceiptsEnabledCached = @(value);
-    }
+    [self.dbConnection setBool:value
+                        forKey:OWSReadReceiptManagerAreReadReceiptsEnabled
+                  inCollection:OWSReadReceiptManagerCollection];
+    self.areReadReceiptsEnabledCached = @(value);
 }
 
 #pragma mark - Logging