diff --git a/cpu/samd21/Makefile.features b/cpu/samd21/Makefile.features
index 96e6fcceee..4b58fe348b 100644
--- a/cpu/samd21/Makefile.features
+++ b/cpu/samd21/Makefile.features
@@ -1 +1,3 @@
+FEATURES_PROVIDED += puf_sram
+
 -include $(RIOTCPU)/sam0_common/Makefile.features