diff --git a/src/mainboard/google/fizz/devicetree.cb b/src/mainboard/google/fizz/devicetree.cb
index 18031d67cd..db6c83f2ed 100644
--- a/src/mainboard/google/fizz/devicetree.cb
+++ b/src/mainboard/google/fizz/devicetree.cb
@@ -86,6 +86,10 @@ chip soc/intel/skylake
 	register "PmTimerDisabled" = "1"
 	register "SendVrMbxCmd" = "1"                  # IMVP8 workaround
 
+	# Intersil VR c-state issue workaround
+	# send VR mailbox command for IA/GT/SA rails
+	register "IslVrCmd" = "2"
+
 	register "pirqa_routing" = "PCH_IRQ11"
 	register "pirqb_routing" = "PCH_IRQ10"
 	register "pirqc_routing" = "PCH_IRQ11"