diff --git a/src/client/ios/Breakpad.h b/src/client/ios/Breakpad.h
index 3bec1a63..c3362b0f 100644
--- a/src/client/ios/Breakpad.h
+++ b/src/client/ios/Breakpad.h
@@ -200,7 +200,9 @@ void BreakpadRemoveUploadParameter(BreakpadRef ref, NSString *key);
 int BreakpadGetCrashReportCount(BreakpadRef ref);
 
 // Upload next report to the server.
-void BreakpadUploadNextReport(BreakpadRef ref);
+// |server_parameters| is additional server parameters to send (optional).
+void BreakpadUploadNextReport(BreakpadRef ref,
+                              NSDictionary *server_parameters = nil);
 
 // Upload a file to the server. |data| is the content of the file to sent.
 // |server_parameters| is additional server parameters to send.
diff --git a/src/client/ios/Breakpad.mm b/src/client/ios/Breakpad.mm
index 3b9f6d3f..2bd7e33b 100644
--- a/src/client/ios/Breakpad.mm
+++ b/src/client/ios/Breakpad.mm
@@ -152,7 +152,7 @@ class Breakpad {
   void RemoveKeyValue(NSString *key);
   NSArray *CrashReportsToUpload();
   NSString *NextCrashReportToUpload();
-  void UploadNextReport();
+  void UploadNextReport(NSDictionary *server_parameters);
   void UploadData(NSData *data, NSString *name,
                   NSDictionary *server_parameters);
   NSDictionary *GenerateReport(NSDictionary *server_parameters);
@@ -448,13 +448,18 @@ NSString *Breakpad::NextCrashReportToUpload() {
 }
 
 //=============================================================================
-void Breakpad::UploadNextReport() {
+void Breakpad::UploadNextReport(NSDictionary *server_parameters) {
   NSString *configFile = NextCrashReportToUpload();
   if (configFile) {
     Uploader *uploader = [[[Uploader alloc]
         initWithConfigFile:[configFile UTF8String]] autorelease];
-    if (uploader)
+    if (uploader) {
+      for (NSString *key in server_parameters) {
+        [uploader addServerParameter:[server_parameters objectForKey:key]
+                              forKey:key];
+      }
       [uploader report];
+    }
   }
 }
 
@@ -784,13 +789,14 @@ int BreakpadGetCrashReportCount(BreakpadRef ref) {
 }
 
 //=============================================================================
-void BreakpadUploadNextReport(BreakpadRef ref) {
+void BreakpadUploadNextReport(BreakpadRef ref,
+                              NSDictionary *server_parameters) {
   try {
     // Not called at exception time
     Breakpad *breakpad = (Breakpad *)ref;
 
     if (breakpad) {
-       breakpad->UploadNextReport();
+       breakpad->UploadNextReport(server_parameters);
     }
   } catch(...) {    // don't let exceptions leave this C API
     fprintf(stderr, "BreakpadUploadNextReport() : error\n");
diff --git a/src/client/ios/BreakpadController.h b/src/client/ios/BreakpadController.h
index be072ea9..cf1fa774 100644
--- a/src/client/ios/BreakpadController.h
+++ b/src/client/ios/BreakpadController.h
@@ -62,6 +62,10 @@
   // The interval to wait between two uploads. Value is 0 if no upload must be
   // done.
   int uploadIntervalInSeconds_;
+
+  // The dictionary that contains additional server parameters to send when
+  // uploading crash reports.
+  NSDictionary* uploadTimeParameters_;
 }
 
 // Singleton.
@@ -84,8 +88,11 @@
 // will prevent uploads.
 - (void)setUploadInterval:(int)intervalInSeconds;
 
-// Specify a parameter that will be uploaded to the crash server. See
-// |BreakpadAddUploadParameter|.
+// Set additional server parameters to send when uploading crash reports.
+- (void)setParametersToAddAtUploadTime:(NSDictionary*)uploadTimeParameters;
+
+// Specify an upload parameter that will be added to the crash report when a
+// crash report is generated. See |BreakpadAddUploadParameter|.
 - (void)addUploadParameter:(NSString*)value forKey:(NSString*)key;
 
 // Remove a previously-added parameter from the upload parameter set. See
diff --git a/src/client/ios/BreakpadController.mm b/src/client/ios/BreakpadController.mm
index 9a6dd814..4571470d 100644
--- a/src/client/ios/BreakpadController.mm
+++ b/src/client/ios/BreakpadController.mm
@@ -120,6 +120,7 @@ NSString* GetPlatform() {
   assert(!breakpadRef_);
   dispatch_release(queue_);
   [configuration_ release];
+  [uploadTimeParameters_ release];
   [super dealloc];
 }
 
@@ -192,6 +193,7 @@ NSString* GetPlatform() {
   NSString* uploadInterval =
       [configuration_ valueForKey:@BREAKPAD_REPORT_INTERVAL];
   [self setUploadInterval:[uploadInterval intValue]];
+  [self setParametersToAddAtUploadTime:nil];
 }
 
 - (void)setUploadingURL:(NSString*)url {
@@ -209,6 +211,13 @@ NSString* GetPlatform() {
     uploadIntervalInSeconds_ = 0;
 }
 
+- (void)setParametersToAddAtUploadTime:(NSDictionary*)uploadTimeParameters {
+  NSAssert(!started_, @"The controller must not be started when "
+                      "setParametersToAddAtUploadTime is called");
+  [uploadTimeParameters_ autorelease];
+  uploadTimeParameters_ = [uploadTimeParameters copy];
+}
+
 - (void)addUploadParameter:(NSString*)value forKey:(NSString*)key {
   NSAssert(started_,
       @"The controller must be started before addUploadParameter is called");
@@ -291,7 +300,7 @@ NSString* GetPlatform() {
       // A report can be sent now.
       if (timeToWait == 0) {
         [self reportWillBeSent];
-        BreakpadUploadNextReport(breakpadRef_);
+        BreakpadUploadNextReport(breakpadRef_, uploadTimeParameters_);
 
         // If more reports must be sent, make sure this method is called again.
         if (BreakpadGetCrashReportCount(breakpadRef_) > 0)