diff --git a/build/BUILD.gn b/build/BUILD.gn
index 7d7e08bb..664e4982 100644
--- a/build/BUILD.gn
+++ b/build/BUILD.gn
@@ -72,4 +72,17 @@ if (crashpad_is_ios) {
       ]
     }
   }
+
+  if (crashpad_is_in_chromium) {
+    import("//build/config/ios/ios_sdk.gni")
+    crashpad_is_ios_app_extension = ios_is_app_extension
+  } else {
+    crashpad_is_ios_app_extension = false
+  }
+
+  config("crashpad_is_ios_app_extension") {
+    if (crashpad_is_ios_app_extension) {
+      defines = [ "CRASHPAD_IS_IOS_APP_EXTENSION" ]
+    }
+  }
 }
diff --git a/util/BUILD.gn b/util/BUILD.gn
index 93b9d544..e7ff4a8a 100644
--- a/util/BUILD.gn
+++ b/util/BUILD.gn
@@ -597,6 +597,10 @@ crashpad_static_library("util") {
     ]
   }
 
+  if (crashpad_is_ios) {
+    configs += [ "../build:crashpad_is_ios_app_extension" ]
+  }
+
   if (crashpad_is_win) {
     libs = [
       "user32.lib",
diff --git a/util/ios/ios_system_data_collector.mm b/util/ios/ios_system_data_collector.mm
index 2ec6de59..bcadba6e 100644
--- a/util/ios/ios_system_data_collector.mm
+++ b/util/ios/ios_system_data_collector.mm
@@ -22,6 +22,7 @@
 #import <UIKit/UIKit.h>
 
 #include "base/apple/mach_logging.h"
+#include "base/notreached.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
@@ -99,7 +100,14 @@ IOSSystemDataCollector::IOSSystemDataCollector()
   build_ = ReadStringSysctlByName("kern.osversion");
   bundle_identifier_ =
       base::SysNSStringToUTF8([[NSBundle mainBundle] bundleIdentifier]);
+// If CRASHPAD_IS_IOS_APP_EXTENSION is defined, then the code is compiled with
+// -fapplication-extension and can only be used in an app extension. Otherwise
+// check at runtime whether the code is executing in an app extension or not.
+#if defined(CRASHPAD_IS_IOS_APP_EXTENSION)
+  is_extension_ = true;
+#else
   is_extension_ = [[NSBundle mainBundle].bundlePath hasSuffix:@"appex"];
+#endif
 
 #if defined(ARCH_CPU_X86_64)
   cpu_vendor_ = ReadStringSysctlByName("machdep.cpu.vendor");
@@ -172,6 +180,7 @@ void IOSSystemDataCollector::InstallHandlers() {
       (__bridge CFStringRef)UIDeviceOrientationDidChangeNotification, this);
   OrientationDidChangeNotification();
 
+#if !defined(CRASHPAD_IS_IOS_APP_EXTENSION)
   // Foreground/Background. Extensions shouldn't use UIApplication*.
   if (!is_extension_) {
     AddObserver<
@@ -185,6 +194,7 @@ void IOSSystemDataCollector::InstallHandlers() {
         this);
     ApplicationDidChangeActiveNotification();
   }
+#endif
 }
 
 void IOSSystemDataCollector::SystemTimeZoneDidChangeNotification() {
@@ -228,6 +238,9 @@ void IOSSystemDataCollector::OrientationDidChangeNotification() {
 }
 
 void IOSSystemDataCollector::ApplicationDidChangeActiveNotification() {
+#if defined(CRASHPAD_IS_IOS_APP_EXTENSION)
+  NOTREACHED_NORETURN();
+#else
   dispatch_assert_queue_debug(dispatch_get_main_queue());
   bool old_active = active_;
   active_ = [UIApplication sharedApplication].applicationState ==
@@ -235,6 +248,7 @@ void IOSSystemDataCollector::ApplicationDidChangeActiveNotification() {
   if (active_ != old_active && active_application_callback_) {
     active_application_callback_(active_);
   }
+#endif
 }
 
 }  // namespace internal