diff --git a/AltBackup.xcconfig b/AltBackup.xcconfig
index 2780fd96..0cbc0732 100644
--- a/AltBackup.xcconfig
+++ b/AltBackup.xcconfig
@@ -1,3 +1,6 @@
 #include "Build.xcconfig"
 
 PRODUCT_BUNDLE_IDENTIFIER = $(PRODUCT_BUNDLE_IDENTIFIER).AltBackup
+
+// retain the non-suffixed bundleID set in $GROUP_ID for APP_GROUP_IDENTIFIER
+APP_GROUP_IDENTIFIER = $(GROUP_ID)
\ No newline at end of file
diff --git a/AltWidgetExtension.xcconfig b/AltWidgetExtension.xcconfig
index 906558e4..1f3cf11a 100644
--- a/AltWidgetExtension.xcconfig
+++ b/AltWidgetExtension.xcconfig
@@ -1,3 +1,6 @@
 #include "Build.xcconfig"
 
 PRODUCT_BUNDLE_IDENTIFIER = $(PRODUCT_BUNDLE_IDENTIFIER).AltWidget
+
+// retain the non-suffixed bundleID set in $GROUP_ID for APP_GROUP_IDENTIFIER
+APP_GROUP_IDENTIFIER = $(GROUP_ID)
\ No newline at end of file
diff --git a/Build.xcconfig b/Build.xcconfig
index b49eb336..a7f46a78 100644
--- a/Build.xcconfig
+++ b/Build.xcconfig
@@ -24,6 +24,9 @@ EXTENSION_PREFIX            = $(PRODUCT_BUNDLE_IDENTIFIER)
 APP_GROUP_IDENTIFIER        = $(PRODUCT_BUNDLE_IDENTIFIER)
 ICLOUD_CONTAINER_IDENTIFIER = iCloud.$(ORG_PREFIX).$(PROJECT_NAME)
 
+// preserve unmodified bundle ID (without any extra suffixes)
+GROUP_ID = $(PRODUCT_BUNDLE_IDENTIFIER)
+
 // Suppress noise from os activity in xcode console log for release builds
 DEBUG_ACTIVITY_MODE = disable