diff --git a/src/soc/intel/pantherlake/Kconfig b/src/soc/intel/pantherlake/Kconfig
index 36417db7c3..6e7cc3f1cc 100644
--- a/src/soc/intel/pantherlake/Kconfig
+++ b/src/soc/intel/pantherlake/Kconfig
@@ -174,6 +174,10 @@ config FSP_TEMP_RAM_SIZE
 	  Refer to Platform FSP integration guide document to know
 	  the exact FSP requirement for Heap setup.
 
+config HEAP_SIZE
+	hex
+	default 0x200000
+
 config CHIPSET_DEVICETREE
 	string
 	default "soc/intel/pantherlake/chipset.cb"