diff --git a/VARIANT_COMPLIANCE_CHANGELOG b/VARIANT_COMPLIANCE_CHANGELOG
new file mode 100644
index 0000000000000000000000000000000000000000..0b13a212d19b21b52418c018636d1105c96ec2da
--- /dev/null
+++ b/VARIANT_COMPLIANCE_CHANGELOG
@@ -0,0 +1,8 @@
+SAMD CORE 1.6.5
+
+* digitalPinToInterrupt #define moved to Arduino.h, variant.h must no longer define it
+
+SAMD CORE 1.6.3
+
+* Timer for pin PWM selected based on value of PIN_ATTR_TIMER_ALT or PIN_ATTR_TIMER, 
+  prior to this pin type was used