diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0abdf1673..e08c97bd9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 Changelog
 =========
 
+* Support adding pre-delivery metadata to out-of-memory reports
+  [#393](https://github.com/bugsnag/bugsnag-cocoa/pull/393)
+
 ## 5.22.3 (2019-07-15)
 
 This release disables reporting out-of-memory events in debug mode, to reduce
diff --git a/Source/BugsnagCrashReport.m b/Source/BugsnagCrashReport.m
index d9150750e..a8dbe2533 100644
--- a/Source/BugsnagCrashReport.m
+++ b/Source/BugsnagCrashReport.m
@@ -242,6 +242,7 @@ - (instancetype)initWithKSReport:(NSDictionary *)report
             _releaseStage = [report valueForKeyPath:@"user.state.oom.app.releaseStage"];
             _handledState = [BugsnagHandledState handledStateWithSeverityReason:LikelyOutOfMemory];
             _deviceAppHash = [report valueForKeyPath:@"user.state.oom.device.id"];
+            _metaData = [NSMutableDictionary new];
             NSDictionary *sessionData = [report valueForKeyPath:@"user.state.oom.session"];
             if (sessionData) {
                 _session = [[BugsnagSession alloc] initWithDictionary:sessionData];
diff --git a/features/fixtures/ios-swift-cocoapods/iOSTestApp/scenarios/OOMScenario.m b/features/fixtures/ios-swift-cocoapods/iOSTestApp/scenarios/OOMScenario.m
index 6408e99e2..6678272d5 100644
--- a/features/fixtures/ios-swift-cocoapods/iOSTestApp/scenarios/OOMScenario.m
+++ b/features/fixtures/ios-swift-cocoapods/iOSTestApp/scenarios/OOMScenario.m
@@ -7,6 +7,12 @@ @implementation OOMScenario
 - (void)startBugsnag {
     self.config.shouldAutoCaptureSessions = NO;
     self.config.releaseStage = @"alpha";
+    [self.config addBeforeSendBlock:^bool(NSDictionary * _Nonnull rawEventData, BugsnagCrashReport * _Nonnull report) {
+        NSMutableDictionary *metadata = [report.metaData mutableCopy];
+        metadata[@"extra"] = @{ @"shape": @"line" };
+        report.metaData = metadata;
+        return YES;
+    }];
     [super startBugsnag];
 }
 
diff --git a/features/out_of_memory.feature b/features/out_of_memory.feature
index 12a9c7815..922b05cff 100644
--- a/features/out_of_memory.feature
+++ b/features/out_of_memory.feature
@@ -18,6 +18,7 @@ Feature: Reporting out of memory events
         And the event "app.releaseStage" equals "beta"
         And the event "app.version" equals "1.0.3"
         And the event "app.bundleVersion" equals "5"
+        And the event "metaData.extra.shape" equals "line"
         And the event breadcrumbs contain "Crumb left before crash"
 
     Scenario: The OS kills the application in the background