diff --git a/device.mk b/device.mk
index f54ec75..85b542c 100644
--- a/device.mk
+++ b/device.mk
@@ -422,3 +422,7 @@
 # OEM Unlock reporting
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += \
     ro.oem_unlock_supported=1
+
+# ro.product.first_api_level indicates the first api level the device has commercially launched on.
+PRODUCT_PROPERTY_OVERRIDES += \
+    ro.product.first_api_level=21