diff --git a/cpu/samd21/Makefile.features b/cpu/samd21/Makefile.features
index 96e6fcceee5119c71d1b64aec283aa4c05c19c02..4b58fe348b4258e5c2612ac9c171d6e874565d43 100644
--- a/cpu/samd21/Makefile.features
+++ b/cpu/samd21/Makefile.features
@@ -1 +1,3 @@
+FEATURES_PROVIDED += puf_sram
+
 -include $(RIOTCPU)/sam0_common/Makefile.features